Deployment: Fix crash if edited deployment is deleted
- Avoid returning null elements as "model children" of deployment edit part (this intermediate stage happens when the deployment object is successively deleted.
- Avoid NPE when trying to determine FileProject (to unregister content adapter) containing deleted deployment (which is already detached from the model).
Issue-Ref: 3429 Issue-Url: https://af3-developer.fortiss.org/issues/3429
Signed-off-by: Simon Barner barner@fortiss.org