Implement modal question creation and remove static bar
Prepare for category sidebar and implement question title renaming

The category sidebar is currently just a clone of the question sidebar.
To make things easier, things could work by having both of them sharing
the SidebarCtrl. It took a while to figure out how Restangular .put()
works - use customPUT() instead for objects!.
Rename methods and pruning files

Removed renamed file and renamed the method for broadcasting a
question is being edited.