Add filters for unavailability in the admin interface.
Add filters for unavailability in the admin interface.

Mte90/remo,johngian/remo,johngian/remo,tsmrachel/remo,chirilo/remo,chirilo/remo,abdullah2891/remo,akatsoulas/remo,flamingspaz/remo,abdullah2891/remo,Mte90/remo,akatsoulas/remo,abdullah2891/remo,flamingspaz/remo,abdullah2891/remo,mozilla/remo,akatsoulas/remo,tsmrachel/remo,Mte90/remo,tsmrachel/remo,johngian/remo,akatsoulas/remo,chirilo/remo,chirilo/remo,Mte90/remo,flamingspaz/remo,flamingspaz/remo,mozilla/remo,mozilla/remo,mozilla/remo,johngian/remo,tsmrachel/remo