fix compact navigation on threads with no comments
fix compact navigation on threads with no comments

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