Bug 1111828 - UITour: Don't allow opening the Loop menu if the toolbarbutton has no placement. r=Gijs

--HG--
extra : rebase_source : fa7eabb2c42f36b2bd171b32749436719b6aec70
Bug 1113739 - Make sure loop.gettingStarted.resumeOnFirstJoin is true before resuming the Hello tour. r=dolske

--HG--
extra : rebase_source : 7faa57772aa4d1d792b8a23abc14d9712598d715