Still missing

 o We only support creating RAID0, RAID1, RAID5 and RAID6 arrays. Notes about
   missing levels

   - Linear: People should be using LVM instead. We will support that at some
             point.

   - RAID4: We could add this but people should be using RAID5 instead. Having
            both would be confusing.

   - RAID10: It is probably more logical to avoid this. People can obtain
             the same effect by create a RAID1 of RAID0s.

   - multipath: ... sigh

   - faulty: This is only for debugging.

   - container: Need to research if Fakeraid etc. using md needs to be treated
     separately. It probably does.

 o Progress dialog. This will be added in a subsequent commit. The idea is to
   refactor src/format-tool/gdu-format-progress-dialog.c into a generic
   GduProgressDialog class.