MOB-238 JS side, to be added after php side

This is the JS for the mobile lightbox sharing ticket: https://wikia-inc.atlassian.net/browse/MOB-238.  We have to wait until 14 days after https://github.com/Wikia/app/pull/1133 is released to release this, as the JS will expect the updated HTML in order to work.  Parser cache lasts for 14 days.