clean revert of undeletion creates conflict

[bastiK]

How to reproduce:

• Delete something in changeset 1
• Undelete it in changeset 2

Now try to revert cs 2 (starting from an empty layer)

Result: Nothing visible on the map. (This is normal, since all objects are in deleted state.) There is a bogus conflict (their version is supposed to be visible and undeleted).

Expected: No conflict, just delete it again.

reverter (21635)

[Upliner]

try out the new version, it seems to be OK in my test cases