Regression test for bug 56913

Changed class to css because multiple classes don't seem to work.
Used _element.text because css selectors seem to return [] by default.

https://mingle.corp.wikimedia.org/projects/internationalization/cards/3822

Change-Id: Ide8c7bd22cc23bb84f24f99faf6b14c2d2ce91de

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

@@ -28,7 +28,7 @@ class PanelPage
 
 	# TODO: Rename to match convention
 	button(:other_language_button, class: 'button uls-language-button', index: 1)
-	button(:default_language_button, class: 'button uls-language-button down')
+	button(:default_language_button, css: '.uls-language-button.down')
 
 	# Triggers
 	span(:trigger_cog, class: 'uls-settings-trigger')