Bug 470455 - Difficulty in creating associations

Caused by too strict check for avoiding creation of connections starting
from the diagram root (see

* Removed that check again
* Introduced new fix (prevent anchor creation on diagrams instead of not
allowing connection start when there is no anchor on current PE)
* Added test for usecase

Change-Id: I561bfc9c4f653045768c282a3ce2d81e4f36c4a2
4 files changed
tree: f3a6df8f401ca2791f8e1f774451214975adc4a3
  1. examples/
  2. features/
  3. plugins/
  4. releng/
  5. tests/