adds label indicator on SupportViewController for Helpshift unread counts
changes text color of Helpshift badge on SupportViewController
adds badge to logged out help button
updates ? help icon to white version
adjusts positioning of count badge
loads Helpshift count dynamically for LoginViewController
prevents possible race condition
Tweaked where we register for Helpshift delegate
Merge pull request #1844 from wordpress-mobile/issue/1804-Notify_user_when_support_has_replied_via_Helpshift

notify user when support has replied via helpshift