BUG: Fixed issues caused by LazyUpdate in subject hierarchy model

Complete scene update triggered by LazyUpdate in subject hierarchy after batch processing caused a crash in certain conditions. This has been fixed by only triggering it at scene import, which is necessary.
invalidateModels replaced with invalidateFilter, which his called when filtering needs to be refreshed, e.g. when removing nodes by plugins

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23535 3bd1e089-480b-0410-8dfb-8563597acbee