Description of problem:
When attaching host device to a running VM (which is invalid action) an inappropriate message displayed: 
Operation Canceled
Error while executing action:
AMD_win7:
    Cannot ${action} ${type} because the VM is in ${vmStatus} status.

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


How reproducible:
Consistently

Steps to Reproduce:
1. Run VM from webadmin UI.
2. Navigate to virtual machines -> select running VM -> host devices -> click on add device.
3. Attach device to VM from the dialog page opened and click OK.

Actual results:
Action rejected by the UI with an inappropriate message: 
Cannot ${action} ${type} because the VM is in ${vmStatus} status.

Expected results:
Correct ${action} ${type} and ${vmStatus} should appear in the message.
Or maybe action should be blocked by the UI when VM is running since hot-plug/hot-unplug is not supported by this feature yet.

Additional info:
oVirt Engine Version: 3.6.0-0.0.master.20150627185750.git6f063c1.el6
Screenshot attached.