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

tests/browser/features/support/pages/random_page.rb

@@ -13,5 +13,4 @@ class RandomPage
   a(:print_export, text: 'Print/export')
   a(:printable_version, text: 'Printable version')
   button(:search_button, id: 'searchButton')
-  a(:uls_trigger, class: 'uls-trigger')
 end