Update navigation after create for certain widgets

If you create a new page, the UpdateNavigationSettingsJob fires off. However, for some reason this doesn't update correctly for navigational based widgets like the "Navigation" and "Calls To Action" widgets. In order for them to populate correctly I found we need to update the navigation settings after the creation of those widgets. This isn't perfect, as there is a slight lag before the widgets are usable, but is better than it was before...

Finishes https://www.pivotaltracker.com/story/show/82132508