drop userSize at session end, not when hiding widget,...

drop userSize at session end, not when hiding widget, https://github.com/microsoft/vscode/issues/109462

src/vs/editor/contrib/suggest/suggestWidget.ts

@@ -421,7 +421,7 @@ export class SuggestWidget implements IDisposable {
 		switch (state) {
 			case State.Hidden:
 				dom.hide(this.messageElement, this.listElement, this.status.element);
-				this._details.hide();
+				this._details.hide(true);
 				this._contentWidget.hide();
 				this.ctxSuggestWidgetVisible.reset();
 				this.ctxSuggestWidgetMultipleSuggestions.reset();

src/vs/editor/contrib/suggest/suggestWidgetDetails.ts

@@ -304,11 +304,13 @@ export class SuggestDetailsOverlay implements IOverlayWidget {
 		}
 	}
 
-	hide(): void {
+	hide(sessionEnded: boolean = false): void {
 		if (this._added) {
 			this._editor.removeOverlayWidget(this);
 			this._added = false;
 			this._anchorBox = undefined;
+		}
+		if (sessionEnded) {
 			this._userSize = undefined;
 		}
 	}