Prevent the invalidation of hidden views (1/2 patch from <Tomi.Leppikangas@oulu.fi> b=34466 r=buster@netscape.com Prevent ViewManager1 from getting into endless loops (patch from <jst@citec.fi> b=25336 r=buster@netscape.com tested=WINNT, Linux, Mac git-svn-id: svn://10.0.0.236/trunk@65880 18797224-902f-48f8-a5cc-f745e15eee43