TreeViewsViewlet no action if expanded state does not change

fixes #41706

src/vs/workbench/browser/parts/views/viewsViewlet.ts

@@ -122,8 +122,10 @@ export abstract class TreeViewsViewletPanel extends ViewsViewletPanel {
 	}
 
 	setExpanded(expanded: boolean): void {
-		this.updateTreeVisibility(this.tree, expanded);
-		super.setExpanded(expanded);
+		if (this.isExpanded() !== expanded) {
+			this.updateTreeVisibility(this.tree, expanded);
+			super.setExpanded(expanded);
+		}
 	}
 
 	protected renderHeader(container: HTMLElement): void {
@@ -784,4 +786,4 @@ export class FileIconThemableWorkbenchTree extends WorkbenchTree {
 		this.disposables.push(themeService.onDidFileIconThemeChange(onFileIconThemeChange));
 		onFileIconThemeChange(themeService.getFileIconTheme());
 	}
-}
\ No newline at end of file
+}