Apply Bugzilla live hacks to Git repo

* Replace references to 'url_quote' (which has been removed from Bugzilla as of
  the 4.2 release) with 'uri'.
  See also: <https://bugzilla.mozilla.org/show_bug.cgi?id=679096>

* Add a non-breaking space to 'My Votes' and enforce consistent capitalization
  on it and other sidebar links.

Change-Id: Ia64f1ea3df4afc3dbfd9dcf3c1e9cefe6ad070a8