- Setup the lsit of flags consistently, by providing the available
and to-be-checked flags.
- In CreatePartitionDialog, assume that ~0 is all the flags.
We get the mountpoints already used by other partitions, and
disable the Ok button in the "Create new partition" dialog if
the user selects/writes a mountpoint which is already used.
We are going to do the same in the Edit partition dialog
after testing.
