CON-2323 | swapped box-sizing in key components for a mixin with -moz- prefix
CON-2323 | Global nav search dropdown placement due to a Firefox<29 bug (Bugzilla ID: 971636)
Merge remote-tracking branch 'origin/dev' into CON-2323

Conflicts:
	extensions/wikia/GlobalNavigation/templates/GlobalNavigation_searchIndex.php
CON-2323 | [minor] decreased indentatnion
Merge pull request #5700 from Wikia/CON-2323

CON-2323 | box-sizing support for Firefox < 29