gtk: Add a dnd styling to notebook tab

src/gtk/sass/_common-3.20.scss

@@ -2272,6 +2272,10 @@ notebook {

                                
                                
                                
                            
                                
                                    
                                        
                                            2272  
                                                      // background-color: $base;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            2273  
                                                      // color: $on-surface;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            2274  
                                                    }
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        2275 +
                                        
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        2276 +
                                                &.dnd {
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        2277 +
                                                  background-color: overlay("dragged", $primary);
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        2278 +
                                                }
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            2279  
                                                  }
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            2280  
                                            
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            2281  
                                                  // FIXME: The tab node doesn't have :drop(active), instead its child box has it.