discourse/discourse — pull request #2713 by cpradio (2014-08-28 18:08:27+00:00)
Title: Set focus on first item in drop down (textbox, link, whatever it may be)

Set focus on first item in the drop down for keyboard users, so they can quickly tab to the link/item of their choosing.
https://meta.discourse.org/t/keyboard-shortcuts-wish-list/15952