F22 Final TC1 delete of "old" disk for installation of new build not possible

[Kamil Paral]

> Hi,
> downloaded F22 Final TC1 workstation x86_64. usb creator - usb flash medium -
> loaded to Acer E15 laptop. Tried to install on external disk with F22 Beta
> 3.
> Delete of "old" partitions not possible. "Speicherplatz zurückgewinnen" not
> high lighted. See Foto attached.

Please report a bug against anaconda into bugzilla.redhat.com. Attach all log files from /tmp. Attach screenshots, preferably in English. Thank you!