Catalog maintenance dialog

[Infi220]

I would like to follow up on the topic from this old thread - http://newsgroup.xnview.com/viewtopic.php?f=60&t=28692 . I have a few suggestions to make this dialog more readable:

1) The dialog title should be "Catalog optimization" (instead of "Catalog maintenance") to make it consistent with the invoking button
2) The help button (question mark) in the titlebar should be functioning. Right now when I click it, it doesn't provide help to any of the entries.
3) I also suggest renaming the options in the dialog, so they are more descriptive:

Optimize (long process) -> Optimize database (long process)
Remove empty directories -> Remove data for empty directories
Clean thumbnails -> Purge all thumbnails
Clean files -> Purge file metadata

Check for orphaned directories -> Remove data for orphaned directories
Check for orphaned files -> Remove data for orphaned files

[oops66]

+1 I support.