Mass amount of changes, see details

Added values to mainbase to check if user is observer, admin, or
eduadmin.

Removed the ability to modify sort order from behaviors, behavior
categories, and locations.
Setting up filter icon to match filter status in observation list
screen.
Rearranged observation list tabs to show upcoming obs first.
Renamed eduadmin tab in users page to eduadmin instead of teachers.
Updating css to work with filter in observation list screen.