blivet-gui option to shrink LUKS partition grayed-out
I have a LUKS partition I would like to shrink. I have an ext4 filesystem directly on the partition (no logical volume stuff).
I understand there are command-line tools that can do this in several difficult (to me) steps. But blivet-gui (since version 2.0) is supposed to be able to resize LUKS partitions. So I have tried this, both from a live media session and from a full install on an external drive (both F25). But when I right-click on the partition and go to the "edit" submenu, the "resize" option is always grayed out. I've tried this with the partition both encrypted an unencrypted, always with the filesystem unmounted. There is also an ntfs partition on this drive, and blivet-gui does give me the option to resize that one.
Any suggestions? I'm using blivet-gui from the repos, version 2.0.2.
