Remove display of 'Previously restored by' in the revisions meta box as it is busted.

Fixes invalid markup (missing closing ul tag) when there was no previously restored revision.

see #25051 for trunk.


git-svn-id: https://develop.svn.wordpress.org/trunk@25194 602fd350-edb4-49c9-b593-d223f7449a82
Nav menus: Allow assigning a new menu to an existing location when no theme setting is currently saved.

props ocean90.
see #25064, for trunk.


git-svn-id: https://develop.svn.wordpress.org/trunk@25195 602fd350-edb4-49c9-b593-d223f7449a82
Use get_nav_menu_locations() in wp_delete_nav_menu().

props nofearinc.
see #25064.


git-svn-id: https://develop.svn.wordpress.org/trunk@25196 602fd350-edb4-49c9-b593-d223f7449a82