Plugins: Fixes navigation between different plugin pages (#52571)

public/app/features/plugins/components/AppRootPage.tsx

@@ -80,9 +80,7 @@ class AppRootPage extends Component<Props, State> {
     const { params } = this.props.match;
 
     if (prevProps.match.params.pluginId !== params.pluginId) {
-      this.setState({
+      this.setState({ loading: true, plugin: null });
-        loading: true,
-      });
       this.loadPluginSettings();
     }
   }