[DMN Editor] Custom data-types - When the user changes a row in the treegrid-table, the DMN model needs to be updated

• When the user changes a row in the "Field name" column, the DMN model needs to be updated;
• When the user changes a row in the "Field type" column, the DMN model needs to be updated.

Aceeptance test

Changed data structure

• After save and reopen
  • Change to structure is not propagated DROOLS-2947
• Change of structure is propagated to other model elements
• Change of structure is propagated to properties panel
  • Properties panel has to be reopened, or element reselected or similar workaround DROOLS-2948
• Change of structure is propagated into the dialog
  • DROOLS-2949
• Edit multiple items in parallel
  • I think this should be disabled as it is really easy then to achieve inconsistent state see DROOLS-2949
• Build and deploy after structure change
  • BAQE-589