bug 494613, maintaining the min-width of add-to-favorites and tweaking the wording
Also: moving white-loading.gif to white-loading-16x16.gif for consistency
git-svn-id: https://svn.mozilla.org/addons/trunk/site/app/webroot/img/amo2009@26887 4eb1ac78-321c-0410-a911-ec516a8615a5