queue refresh when deco is removed (#3738)

src/browser/Decorations/OverviewRulerRenderer.ts

@@ -74,6 +74,7 @@ export class OverviewRulerRenderer extends Disposable {
    */
   private _registerDecorationListeners(): void {
     this.register(this._decorationService.onDecorationRegistered(() => this._queueRefresh(undefined, true)));
+    this.register(this._decorationService.onDecorationRemoved(() => this._queueRefresh(undefined, true)));
   }
 
   /**

src/common/services/DecorationService.ts

@@ -35,6 +35,7 @@ export class DecorationService extends Disposable implements IDecorationService
           const index = this._decorations.indexOf(decoration);
           if (index >= 0) {
             this._decorations.splice(this._decorations.indexOf(decoration), 1);
+            this._onDecorationRemoved.fire(decoration);
           }
         }
       });