tree: fix partitions order if there are encryptred (Closes: #39896)

EFI: show warning if there is no /boot/efi partition
fix crash at specific conditions when going back and cancelling pending

Fix disk grouping in case of multiple partitions on the same disk

catch exception when restoring invalid value after backend error

Forward exception message when getting options from backend

Pending changes: fix LUKS partitions

Pending changes: fix NVMe and mmcblk installations

Show pending changes made by user/profile

Fixed disk groups when there are no objects on disks

Make possible to clear selected disks

Don't encrypt last unencrypted disk
Remove redundnant buttons when creating partition on already created LV

Detect and show encrypted volumes on unpartitioned disks

Catch lvm2 VG shrink exception

Show "Unknown" for volumes with unknown fs

Fixed crashing when handling insufficient space on disk using LVM profile

Fixed parentheses in default vm-profile.scm;
Added support of PowerPC PReP partition on GPT;
Changed profile to automatically create PReP partition on virtualized