Tested on RC03: https://qa2-us.nightly.sakaiproject.org, build: 20.0-rc03

I can search and select a custom icon, hit enter and it displays there, but the next tab takes me to the "Gateway" link instead of "Update Options".

Tested 21x: https://trunk-mysql.nightly.sakaiproject.org, build: 75ac8881 - same behavior

Added 20 to affects for https://sakaiproject.atlassian.net/browse/SAK-43492#icft=SAK-43492

QA: I think this should get QA'd and merged. I plan to also fix the focus when tabbing out (or selecting an icon) as the focus goes to a (seemingly) random place. That feels like a new issue and created https://sakaiproject.atlassian.net/browse/SAK-43492#icft=SAK-43492 for this, but this component looks better and seems to at least work for keyboard selection. 

Would like some feedback though! Thanks!

FYI The same picker is used in LTI and Site Manage. I'm going to see about replacing all of these. 

This looks like a library that we'd picked up and was modified slightly by Dr. Chuck

https://fonticonpicker.github.io/

The version we have is from 2015 and there is an updated version but it still doesn't look like it has keyboard accessibility to trigger the dialog and even if you did that, there's no keyboard accessibility within the dialog. 

This one is keyboard accessible https://github.com/itsjavi/fontawesome-iconpicker

It looks about the same. The official demo doesn't work but I forked it and the demo there works. https://jonespm.github.io/fontawesome-iconpicker/

I think inside the Dropdown actually works the best.

The escape button currently doesn't work to close the dialog, I'll see if I can fix that as it's a little annoying to test otherwise.