Chrome Version: 66.0.3359.137 (Official Build) (64-bit)
Chrome OS Version: 10452.74.0 (Official Build) stable-channel eve

I frequently hit Ctrl+Alt+/ instead of Ctrl+Alt+. when trying to fast-switch between users. This brings up the new pop-up UI listing all the keyboard shortcuts.
Annoyingly, it can't be dismissed easily from the keyboard (either via hitting Ctrl+Alt+/ again, or Esc, or Ctrl+W), I have to go back to the touchpad and move the pointer to the Close button of the pop-up.

Can we put back a way to easily dismiss the pop-up window from the keyboard?