Add Menu Items search

[kevinlearynet]

The search tab of the "Add menu items" section of Appearance > Menus is a source of confusion for many people. I've been solving for this with a filter hook for many years now, accross many sites, and the approach has consistently been well received. I think it'd be a good contribution to the core.

Functionally, this enhancement will adjust the Search tab of the Add menu items section so that only page/post/post type title will be searched. The adjustments results in much more specific search results, which is tremendously beneificial on sites with many pages.

Improve the menu item search by matching terms on post_title only.

An adjustment to the Appearance > Menus search feature so that only post_title is used for matching. This results in a more intuitive UI that aligns with what many people expect, and improves the ability to build a menu on sites many posts or pages.

Trac ticket: Add Menu Items search

[joedolson]

This looks like a duplicate of #48655; would you be willing to update your PR to point to that ticket, instead? I can't see any significant difference between the two tickets.

I'm happy to help shepherd this through, and it'll be easier to move it forward on the existing ticket, which is already milestoned for 6.9. It will need to be committed before beta 1, however, which is scheduled for October 21.

[joedolson]

Marking this as a duplicate of #48655, to keep the conversation in one place.