The URL widget enters an infinite loading state when a Map widget is added to the Override host field. The map widget also goes into infinite loading mode.

Steps to reproduce:
1. Create a new Map;
2. Go to the Dashboards;
3. Create a new Map widget;
4. Create a new URL widget and add the map widget to the Override host field -> the URL widget does not show after creation;
5. Save the dashboard.

Result:

Expected:
1. The URL widget must appear in the dashboard after creation and before saving the dashboard.
2. No infinite loading is expected after saving the dashboard.