fdisk: remove unnecessary code

Signed-off-by: Karel Zak <kzak@redhat.com>
cfdisk: add parttype dialog

Signed-off-by: Karel Zak <kzak@redhat.com>
cfdisk: improve add parttype UI

Signed-off-by: Karel Zak <kzak@redhat.com>
cfdisk: add help screen

Signed-off-by: Karel Zak <kzak@redhat.com>
cfdisk: improve write dialog

Signed-off-by: Karel Zak <kzak@redhat.com>