UI Request: Search/Replace Arrow Keys

UI request for Edit book and Viewer:

In Viewer, the ToC search combo box, when focused, lets me use up/down arrow keys to scroll prior searches.

in Edit, the text search and replace combo boxes (and search in Viewer) do not--I have to click the dropdown button.

Any chance of getting that added?

Viewer ToC search uses calibre.gui2.search_box.SearchBox2, which appears to explicitly code for up/down arrow keys.

I'm using Calibre 8.5 on Win10.