It should be possible to style the language alert without impacting the opt in
action.
Bug: T317899
Change-Id: Ifea7d476099ab3a09da20522380664b9ad5eceb3
Rename template and CSS files to match updated naming conventions, replaces instances of "sidebar" with "main menu"
Bug: T316570
Bug: T317437
Change-Id: Ib4050768f20b1734d356104f18aa539f657099d8