Versions beyond 21.09.1 do not allow restoring to a different drive and booting into it

[wizardfromoz57]

When restoration completes a reboot either drops you to a grub prompt, or else boots into a different distro, requiring an update-grub operation to boot into the restored distro.

Steps to reproduce the behavior:

1. Requires two or more drives available, the target drive formatted to EXT4 and with an ESP available
2. Restore source, stored snapshot to separate, target drive
3. When restoration completes, close Timeshift and reboot
4. No Error message at any time
   Expected behaviour
   A reboot of the machine, if the snapshotted distro is Debian-based (includes Debian, Ubuntu and Linux Mint) or Manjaro, should have the restored distro on top of the Grub Menu and boot into it.

ACTUAL BEHAVIOUR
A reboot of the machine will result in one of two (1 of 2) outcomes:

1. Does not make it to the grub menu, other distribution/s have to have grub updated to show the restored distribution.
2. Does not boot to grub menu - drops the user to a tty grub prompt. Computer has to be rebooted and short boot order and advanced recovery option used to replace another distro, then update-grub to follow to access restored distro.

Screenshots
Can be provided if requested

System:

• Linux Distribution Name and Version: - numerous
• Desktop [e.g. MATE, XFCE] - All desktop environments
• Application Version - any version beyond v21.09.1,
• No success with any version since Linux Mint took over Timeshift
• No success with 22.06.1 (Tony George's last official release)
• No success with 22.06.6 (Tony George's contribution to remedy libglib version problem)