Uncover a bug and fix it in the process \o/ - it seems that the
close icon is misplaced between clicking the notifications icon
and loading the contents of the overlay - this confuses the webdriver
as the button is not clickable.
Bug: T219920
Change-Id: Ib4d076fd9b7ea1cd48b6b58940a50560eacd51a0
jdlrobson