reset sticky scroll rendering when having no model

fixes microsoft#165385

Author: jrieken

src/vs/editor/contrib/stickyScroll/browser/stickyScrollController.ts

@@ -112,12 +112,11 @@ export class StickyScrollController extends Disposable implements IEditorContrib
 			return;
 		}
 		const model = this._editor.getModel();
-		if (this._stickyLineCandidateProvider.getVersionId() !== model.getVersionId()) {
-			// Old _ranges not updated yet
-			return;
+		const stickyLineVersion = this._stickyLineCandidateProvider.getVersionId();
+		if (stickyLineVersion === undefined || stickyLineVersion === model.getVersionId()) {
+			this._widgetState = this.getScrollWidgetState();
+			this._stickyScrollWidget.setState(this._widgetState);
 		}
-		this._widgetState = this.getScrollWidgetState();
-		this._stickyScrollWidget.setState(this._widgetState);
 	}
 
 	public getScrollWidgetState(): StickyScrollWidgetState {

src/vs/editor/contrib/stickyScroll/browser/stickyScrollProvider.ts

@@ -91,7 +91,7 @@ export class StickyLineCandidateProvider extends Disposable {
 	}
 
 	public getVersionId() {
-		return this._model?.version ?? -1;
+		return this._model?.version;
 	}
 
 	public async update(): Promise<void> {