gtk(firefox): Add a workaround for disabled menuitem label color

src/_sass/gtk/apps/_misc.scss

@@ -188,6 +188,12 @@ tooltip.background.chromium { background-color: rgba($tooltip, 1); }

                                
                                
                                
                            
                                
                                    
                                        
                                            188  
                                            
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            189  
                                              // remove ugly border around the menus
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            190  
                                              menu { border: none; }
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        191 +
                                        
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        192 +
                                          // Workaround: Firefox doesn't properly read color from
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        193 +
                                          // menuitem:disabled, but from menuitem label:disabled.
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        194 +
                                          menuitem label:disabled {
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        195 +
                                            color: $text-disabled;
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        196 +
                                          }
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            197  
                                            }
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            198  
                                            
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            199  
                                            // for backward compatibility