Fix sidebar-and-tab-navigation-tests

- Move enabling extensions in tests to a proper location
- Fix flushing promises

Signed-off-by: Sebastian Malton <sebastian@malton.name>

src/extensions/extension-loader/file-system-provisioner-store/file-system-provisioner-store.ts

@@ -34,7 +34,6 @@ export class FileSystemProvisionerStore extends BaseStore<FSProvisionModel> {
     });
 
     makeObservable(this);
-    this.load();
   }
 
   /**