Customize: allow terms to be created in nav menus
|Reported by:||celloexpressions||Owned by:||boonebgorges|
Follow up to #34923. When setting up initial site structure, in many cases it's as important to be able to create new terms to add to menus as the ability to create posts. For users, the distinction between terms and posts probably isn't immediately clear, so this functionality gap may be confusing.
There are several patches on #34923 that contain the needed framework here, but we need the ability to preview terms before we can add support for terms.
This depends on #37914. Milestoning for 4.7 now for tracking, but we're waiting for that ticket before we can proceed here.