two things wrong with the old code:
* the sort function wants -1, 0 and 1 as a return value for a<b, a==b and a>b
respectively, not a bool (which a < b returns)
* we have to sort the newest backups first, since the first reason is
'keep-last'. until now, we sorted the oldest backup first, resulting
in the older backups getting the 'keep-last' reason
reported by a user in the forum:
https://forum.proxmox.com/threads/prune-ui-and-prune-schedule-simulator-dont-match.94944/
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
we are not actually pruning the whole datastore, but only the single
group, so set that as a title
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
