gtk: Adjust transition-duration of selection-mode headerbar

src/_sass/gtk/_common-3.20.scss

@@ -1159,7 +1159,7 @@ headerbar {

                                
                                
                                
                            
                                
                                    
                                        
                                            1159  
                                              &.selection-mode {
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1160  
                                                // 0.1ms was a workaround for https://gitlab.gnome.org/GNOME/gtk/issues/698
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1161  
                                                // but let's keep it for backwards compatibility.
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        1162 -
                                            transition: background-color 0.1ms $ripple-fade-in-duration, color $ripple-fade-in-duration $ease-out;
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        1162 +
                                            transition: background-color 0.1ms $ripple-fade-in-duration, color $duration $ease-out;
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1163  
                                                animation: ripple-on-headerbar $ripple-fade-in-duration $ease-out;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1164  
                                                box-shadow: $shadow-1, inset 0 1px highlight($primary);
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            1165  
                                                background-color: $primary;