
- optimize dirSetOptions(NOMAGIC) and dirClearOptions(CHECK_FILES) (avoid
  rereading of directory contents)

- distinguish between Move/Copy/Link in drop actions?

- perform copy and delete operations in the background, and allow these
  operations to be interrupted by the user

- add support for moxfm drag and drop targets

- add a built-in find file operation

- add a dialog to define new and edit existing file types on the fly

- allow submenus in command and file popup menus
