uSync.Complete 17.7.0 and v19 branch

Released uSync.Complete 17.7.0
17.7.0: Side by side preview tab on Publisher, Exporter, snapshot, restore point and TimeMachine reports, previewing from the sync pack rather than the site's folders
17.7.0: 60-day temporary licence for older keys, uSyncPublisherActionCompletedNotification, new "Content & Media" server template ("Content & Media & Settings" is now "Everything")
17.7.0: settings pushes only send the picked file types; Sync Queue items are cleared after approval or when nothing changed
v19 branch: .NET 11, Umbraco 19.0.0-beta1, uSync 19 prereleases, clients on the v19 @jumoo packages (#237)