Currently, when users click on the trash icon next to a DMN node, it removes the DRG element (e.g.: decision) and the respective DMNShape.

Now, the expected behaviour is: when users click on trash icon:

• When users remove a node from the DRG context, the DRG element and the DMNShape must be removed (as it's currently happening);
• When users remove a node from a DRD context, the DRG element must not be deleted, but the DMNShape do need to be removed;