Remove dynamic config from "recent" when it is added to launch.json (microsoft#160583)

Fix microsoft#156632

Author: roblourens

src/vs/workbench/contrib/debug/browser/debugConfigurationManager.ts

@@ -219,6 +219,7 @@ export class ConfigurationManager implements IConfigurationManager {
 							// Only Launch have a pin trigger button
 							await (launch as Launch).writeConfiguration(config);
 							await this.selectConfiguration(launch, config.name);
+							this.removeRecentDynamicConfigurations(config.name, config.type);
 						}));
 					});