The "Related Elements" view crashes when using dynamic instances (e.g. domain instances)

[pcdavid]

1. Create a domain model with two entities Parent and Child, with a containment relationship beween them.
2. In another project, create a instance of Parent, add a Child in it.
3. Select the Parent.
4. Open the "Related Elements" view in the right panel.

Exception while fetching data (/relatedElementsEvent) : The string resource '_UI_Parent_children_feature' could not be located

CurrentTreeProvider.getContainmentReferenceLabel(EObject, EReference) (and maybe other providers) do some EMF.Edit-specific magic to get the label of the containment feature which breaks for domain instances.

[pcdavid]

The exception above is actually one of many. Several parts of the 3 {Current,Incoming,Outgoing}TreeProvider break/incorrectly return null on dynamic instances.