Automatically adjust size of growable devices for new format
Automatically adjust size of growable devices for new format

Without this kickstart 'part /home --size=1 --grow --encrypted'
will fail because min size for LUKS is 2 MiB.

Resolves: rhbz#1680013

rvykydal/blivet,jkonecny12/blivet,jkonecny12/blivet,vojtechtrefny/blivet,rvykydal/blivet,vojtechtrefny/blivet