* add @custom_browser tag so we don't create an extra browser instance
* remove @chrome tag because this only works in Firefox
* alphabetize within G/W/T buckets in commons_steps.rb
* alphabetize flyout_steps.rb
* bring env.rb up to date with the modern situation
* make assertions about the URL and heading on the final destination page
* update Ruby gems, especially mediawiki-selenium with a @custom_browser improvement
** use modern RSpec assert syntax
*** we're going to have to update all the repos for this soon
Change-Id: I6cb20126a662bd2a20e2b4bbebe91e8f3b04c7df
* use symbols not strings for element labels
* use double quotes except where single quotes required
Change-Id: I4eef50206c526611da535e529035c076d5bce266
Also adds browser tests for the behaviour of the mark all as read button
to ensure it only clears message notifications.
Dependency: Ifb7b1b7b7feb4a5af65c79bb16b91a5a9c70166c
Change-Id: I46e1de229e32d705e67cebde678ecea3f3633906
