The modeler misbehaves during an undo action, it's only regarding to visualization subject.
How to reproduce:
Precondition: In a project with at least 2 Object Entities with ObjRelationship and ObjAttribute in their list: ObjEntity1 and ObjEntity2
- go to ObjEntity1 and remove an ObjRelationship
- switch to the ObjEntity2 to visualize its attribute(s) and relation(s)
- go to main menu and select undo
- the ObjAttribute list is now incorrect, the modeler only refresh the ObjRelationship list.