In addition to _object_ animation, now _object data_ (mesh, curve, ...) animation can now be made single user as well. This came up in T89369 and while it is possible to do this via the Outliner [where all actions have to be selected individually], this seems to be more convenient to be done from the 3DView. note: usercount of the action is checked now, if it single-user already, no copy takes place (same thing could/should be done for single_object_action_users as well). note2: obdata is made single user as well (otherwise duplicated actions will be assigned to the same shared obdata - which does not result in unique animadata which is what we are after here) ref. T89369 Maniphest Tasks: T89369 Differential Revision: https://developer.blender.org/D11683