Description of problem:
If user A start to work on Business Process but user B user Force Unlock button for unlock this process. User A can to continue his work but can't to use save button. It can cause waste of time by user A because no warnings was shown for user A after Force Unlock button was clicked by user B. See Attachment.

Version-Release number of selected component (if applicable):
6.2.CR1

How reproducible:
always

Steps to Reproduce:
1. Open BP with user A and start to edit
2. Open BP with user B and use Force Unlock button
3. Start to edit the Business Process by user B
4. Try to edit the Business Process by user A and try to save it.

Actual results:
User A can continue to edit the Business Process but can't to save it.

Expected results:
User A can't continue to edit the Business Process.