Cannot search for icon by name in custom sidebar section configuration modal

[Lilly]

Overview

When configuring custom sidebar sections and choosing an icon from the selector, the search field does not allow typing in the field to search for the icon by name.

Steps to reproduce

1. Click/tap the + icon at the bottom of the sidebar to create a new custom sidebar menu section.
2. Click/tap to select an icon for a link
3. Try to type into the search field and fail
   
   

Expected result

Should be able to type into the search field to quickly find an icon by the first few letters of it’s name. See the category setup page icon selector for an example of expected functionality:

Observed result

Cannot type in the search field; must scroll to find and manually select icon.

Additional information

Bug can be reproduced on Meta and in safe mode. All viewports, multiple browsers.