Refactor "Open language selector when logged in"

Removed tags @uls-in-sidebar-only and @uls-in-personal-only.
We will figure out a better solution.

Alterted the test so that it catches if the language selector is
not visible in the viewport to catch regressions like bug 56937.

Bug: 56937
Change-Id: Ie8a37bf4f38e9c82e0c14736f2bc29e8ec1331ff
Merge "Refactor "Open language selector when logged in""