check whether it's still in the same subtree as its mForm. If it is, then don't remove it from the form. Bug 291042, r=sicking, sr=peterv, a=chofmann git-svn-id: svn://10.0.0.236/trunk@172938 18797224-902f-48f8-a5cc-f745e15eee43
check whether it's still in the same subtree as its mForm. If it is, then don't remove it from the form. Bug 291042, r=sicking, sr=peterv, a=chofmann git-svn-id: svn://10.0.0.236/trunk@172938 18797224-902f-48f8-a5cc-f745e15eee43