[Story] Add a page suggester to Special:ItemByTitle
Open, LowPublic

Description

Item by title should have a drop-down suggester to look up a title. A first WIP draft for a page lookup can be found in https://gerrit.wikimedia.org/r/234966.

The drop-down for the page was broken and fixed in T68744: [Bug] Item by title search - no site selection dropdown.