Bug 396893 - Configurable drop target listener registration

*Re-applied fix that had been done for DiagramEditor after branching,
coding needs to be moved to DiagramBehavior

Change-Id: I808d9af84e9d7c4f473404858fcb2f828d1f7180
1 file changed
tree: f2859d27e1cb0a6d0870242e0654c543798b00d2
  1. examples/
  2. features/
  3. plugins/
  4. releng/
  5. tests/