Decision Services & multiple DRDs: Adding a Decision Service to a DRD.

[tiagobento]

On the DMN Editor, when a Decision Service is added to a DRD, all of its contained Decisions need to be moved inside it or added to the DRD, so that the internal depiction of that Decision Service is exactly the same as all other DRDs, or automatically layout'ed if none is found. However, if one of its contained Decisions it also contained by other Decision Services present on that DRD, and one of them is in expanded form, the Decision Service is added as collapsed, and no Decisions are added or moved.

EDIT: When the collapsed case happens, we also need to check for any Decisions that are contained by the Decision Service that is being added as collapsed. Those Decisions need to be removed from the DRD, as they're "swallowed" by the Decision Service.

[tiagobento]

@ljmotta Found a case we forgot... added to the description.