Fix issue where destroyed invitations could not be found by the mailer
Fix issue where destroyed invitations could not be found by the mailer

crewmate/crewmate,vveliev/teambox,ccarruitero/teambox,teambox/teambox,codeforeurope/samenspel,irfanah/teambox,nfredrik/teambox,teambox/teambox,nfredrik/teambox,ccarruitero/teambox,vveliev/teambox,vveliev/teambox,nfredrik/teambox,rahouldatta/teambox,codeforeurope/samenspel,nfredrik/teambox,teambox/teambox,irfanah/teambox,crewmate/crewmate,irfanah/teambox,irfanah/teambox,crewmate/crewmate,rahouldatta/teambox,vveliev/teambox,rahouldatta/teambox