Duplicate item on pane, e.g. in Domain Diagram

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Create a new item in Domain Diagram, e.g. an Association
2. Try to duplicate it
3. Does not work easily :)

What is the expected output?
Select item with mouse, press CTRL or ALT on keyboard and copy is automatically 
created which can be moved to new position within pane / domain diagram

What do you see instead?
Function not implemented


What version of the product are you using?
20101014 beta

On what operating system?
Mac OS 10.6.4


Please provide any additional information below.
See Powerpoint for functionality, works with shapes exactly like this

Original issue reported on code.google.com by morten.k...@whu.edu on 14 Oct 2010 at 12:16