Add missing stylesheet pack tag
Add missing stylesheet pack tag

Without this the CSS doesn't get included in production mode.
ualbertalib/avalon,avalonmediasystem/avalon,nulib/avalon,nulib/avalon,avalonmediasystem/avalon,uvalib/avalon,ualbertalib/avalon,ualbertalib/avalon,uvalib/avalon,avalonmediasystem/avalon,nulib/avalon,uvalib/avalon,ualbertalib/avalon,avalonmediasystem/avalon,uvalib/avalon,nulib/avalon