Added content filter toadlet, as well as option to test filter from insert file wizard.
Only show content filter toadlet in advanced mode.
Merge remote branch 'vwoodzell/filter-toadlet' into filter-toadlet
Sanitize output filename when saving from content filter toadlet.
Fix bugs in default file extension lookup.
Add removeChildren()
Merge remote branch 'vwoodzell/filter-toadlet' into filter-toadlet
Merge branch 'filter-toadlet' into next