[FIX] Clicking on a relation in CDViewer now shows the correct relation instance in the RelationView
[FEATURE] RelationView now show the actually set dimension values on the phenomenon level and the highlights them on the relation level
[REFACTOR] node -> element, link -> relation
[FIX] ViewerURI can now serve as a replacement vor URI (before equals failed)
[LOG] Updated Relation(Instance).toString
[NOP]
[FIX] Changes to relations are saved now
[FIX] RelationInstances are now correctly updated if a Relation is renamed
[FEATURE] Show indirect relation instances in relation view
[INTERNAL] Creation of ACM simplified (using a separate shell)
[FEATURE] ACMs now remember their origin and can be recreated / refreshed
[UI] The grounding is shown in the ACM. 
[FIX] Selections in RelationViewer now expands the tree so the selection becomes visible
[FIX] Create ACM repaired
[UI] The ACM's origin elements are highlighted
[NOP]
[FIX] Show item in workspace on double click now also works in CodeInstanceViewer
[UI] CodeInstances and RelationInstances now are better distinguishable from phenomenons