Respect the autoClose property

studio-frontend/src/app/app.element.ts

@@ -204,7 +204,7 @@ export class AppElement extends LitElement {
 			<!-- Studio-mode-only elements -->
 			${this.#params.mode === StudioMode.Editor ? html`
 				<!-- TODO: Move this -->
-				<sts-menu .trigger=${this.#addToSceneButtonRef}>
+				<sts-menu autoClose .trigger=${this.#addToSceneButtonRef}>
 					<sts-button
 						role="menuitem"
 						icon="cube"

studio-ui/src/lib/menu.element.ts

@@ -81,7 +81,8 @@ export class MenuElement extends LitElement {
 		event.stopPropagation();
 
 		if (
-			event.target
+			this.autoClose
+			&& event.target
 			&& event.target instanceof HTMLElement
 			&& event.target.role === "menuitem"
 		) {