Admin fixes

Numerous admin fixes:
* Text field for Site Name in Location edit form is now longer
* Added QRIS rating as a dropdown menu in Location edit form
* Fixed NoReverseMatch when trying to add new location.
* Prevented non-admins from bypassing audit system by using batch delete command.
* Fixed deletion confirmation page to remove "propose" when user is admin.
* Put the delete button back in the Location edit page button row.