MUMPO-1417: Change side menu question mark with circle to just question mark
MUMPO-1417: Change side menu question mark with circle to just question mark

Angular side of this : https://github.com/UW-Madison-DoIT/uPortal/pull/290
Change the side menu question mark icon to a question mark without a circle. Unfortunately there was no glyphicon for a question mark without a circle, so I changed it to a font awesome question mark. For consistent looks across all the icons, I changed all the side menu icons from glyphicons to font awesome icons.
The fa-fw was to keep the fixed width.
jiayinjx/angularjs-portal,apetro/angularjs-portal,timlevett/angularjs-portal,nblair/angularjs-portal,nblair/angularjs-portal,timlevett/angularjs-portal,davidmsibley/angularjs-portal,jiayinjx/angularjs-portal,paulerickson/angularjs-portal,paulerickson/angularjs-portal,nblair/angularjs-portal,UW-Madison-DoIT/angularjs-portal,davidmsibley/angularjs-portal,jiayinjx/angularjs-portal,UW-Madison-DoIT/angularjs-portal,UW-Madison-DoIT/angularjs-portal,UW-Madison-DoIT/angularjs-portal,apetro/angularjs-portal,paulerickson/angularjs-portal,davidmsibley/angularjs-portal,jiayinjx/angularjs-portal,apetro/angularjs-portal,paulerickson/angularjs-portal,davidmsibley/angularjs-portal,nblair/angularjs-portal