Modifying a User created widget with an explicit navigation will cause the navigation to revert to it's default settings

EDIT: Initial investigation done, check comments.

If the user creates a widget and then places that widget inside of another widget via the User created section and then sets up a navigation using the "explicit" setting, the explicit setting will be removed if the user then makes changes to the original widget.

1. Open the Editor
2. Create a new widget blueprint and Name it "CButton"
3. Add an image to the designer tab
4. Save and compile
5. Create another New Widget Blueprint and name it "Holder"
6. Add 4 CButton widget to the designer tab
7. Change the navigation to that of the other 4 CButtons using the Explicit setting (Use the names of the CButtons)
8. Save and compile
9. Open up the widget blueprint CButton again
10. Delete the image and place a button inside of the designer tab instead
11. Save and compile
12. Open the widget blueprint Holder
13. Save and compile
14. Notice that the navigation has reverted to default (Escape)

Expected: The CButtons would update with a button instead of an image in this case and would retain the navigation settings applied to the widget
Result: The Navigation settings are reset