7zip archive handler commands change to IG version
Deal with no archive handlers when restoring defaults
Archive handler MIME type and extension validation - explicitly tell user to provide MIME or extension
Add mnemonics to everything in archive configuration and new archive dialogs...
Requested style change to tar archive handler names
Deal with possibility of archive handler without extension set - ignore it when listing handlers for archive creation
Add help button to archive creation dialog
Aarchive creation dialog title change
Make gzip extraction command ignore preference to create subdirectory