gtk: Remove outline from switch slider certainly

src/_sass/gtk/_common-3.20.scss

@@ -2129,6 +2129,7 @@ switch {

                                
                                
                                
                            
                                
                                    
                                        
                                            2129  
                                                min-height: 20px;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            2130  
                                                margin: -3px -2px;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            2131  
                                                border-radius: $circular-radius;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        2132 +
                                            outline: none;
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            2133  
                                                box-shadow: 0 0 0 10px transparent, $shadow-1;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            2134  
                                                background-color: $surface;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            2135  
                                              }