- change burning speed to listbox and get value for current burner
- check if used space is not always refreshed even if advanced option says nope
- Show space left for multi-session DVD (-dry-run option?)
- The "delete files/folders" and "clear list" should be disabled if no files are in the text view
- Burning simulation support (growisofs seems to not support it)
- Solve problem with freebsd strange naming of tcl/tk interpreters
- Add a way to check burned media