Duplicate connection message inappropriate appearance

1. Open WD
2. Add Read Sequence element
3. Add input data from shared data base
   Expected: Shared database connection dialog appeared
4. Create two identical connections (or they can be already saved before WD opening)
5. Deselect Read Sequence element (click on empty space)
6. Select Read Sequence element again
   Current state: Connection Duplicate Detected dialog appeared.

If there are two identical connections, 'Connection Duplicate Detected' dialog appeared each time on any 'Read Data' element selection.