Bug/restore query editor tabs (#6654)

* trial run for query editor temp file fix

* Fixing restore tabs bug with right layering

* Moving FileService change from vscode to our code

src/vs/workbench/browser/parts/editor/editorGroupView.ts

@@ -426,6 +426,8 @@ export class EditorGroupView extends Themable implements IEditorGroupView {
 	}
 
 	private async restoreEditors(from: IEditorGroupView | ISerializedEditorGroup): Promise<void> {
+		await this._group.removeNonExitingEditor(); // {{SQL CARBON EDIT}} @udeeshagautam perform async correction for non-existing files
+
 		if (this._group.count === 0) {
 			return; // nothing to show
 		}