* updating vendor files
* updating class syntax (to new FA-based classes) for all UI elements
* correcting broken tests

removed symbolset, replaced with fontawesome for alerts, notifications, and all references in js files

Also, a SystemFeedback model no longer has a `type`, it has an `intent`. This is
because SystemFeedback views have `type`, as well, and this prevents a naming
collision.

Model shouldn't know about things like close buttons, visibility, and so on