gtk/combobox: Update the arrow button style

src/gtk/sass/_common-3.20.scss

@@ -1119,11 +1119,17 @@ spinbutton {

                                
                                
                                
                            
                                
                                    
                                        
                                            1119  
                                            
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1120  
                                            combobox {
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1121  
                                              arrow {
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        1122 +
                                            transition: -gtk-icon-transform $duration $ease-out;
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1123  
                                                -gtk-icon-source: -gtk-icontheme('pan-down-symbolic');
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1124  
                                                min-height: 16px;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1125  
                                                min-width: 16px;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1126  
                                              }
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1127  
                                            
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        1128 +
                                          button.combo:checked arrow {
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        1129 +
                                            // color: $primary;
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        1130 +
                                            -gtk-icon-transform: rotate(-.5turn);
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        1131 +
                                          }
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        1132 +
                                        
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1133  
                                              // workaround for menuitem selection
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1134  
                                              decoration {
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1135  
                                                transition: none;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        

@@ -1175,7 +1181,7 @@ combobox {

                                
                                
                                
                            
                                
                                    
                                        
                                            1181  
                                              }
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1182  
                                            
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1183  
                                              > .linked:not(.vertical) > button:not(:only-child) {
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        1178 -
                                            @extend %button-flat-activatable;
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        1184 +
                                            @extend %button-flat-basic;
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1185  
                                                // @extend %button-small;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1186  
                                            
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1187  
                                                min-height: 16px;