Bug 830156

Description of problem:
When user tries to perform Detach ALL Clusters on network which is connected to host and in use by VMs (see screenshot 1), UI will allow to edit fields which are not supposed to be editable at the moment. (see screenshot 2)

Version-Release number of selected component (if applicable):
oVirt Enterprise Virtualization Engine Manager Version: 3.1.0_0001-11.el6ev 

How reproducible:
100%

Steps to Reproduce:
1. Add logical network -> attach the network to host and to VM
2. Go to Data Centers -> your DC -> Logical Networks -> your network -> Edit (screenshot 1)
   a) Click on "Detach ALL Clusters" button
   b) check approve operation, click OK, click Close (screenshot 2)
  
Actual results:
UI will allow to edit fields which are not supposed to be editable at the moment

Expected results:
UI will display fields in same state as the were before detach attempt

Additional info:
- bug reproduces for DC 3.0 and cluster 3.0 as well as for DC 3.1 and cluster 3.1

- only log produced in engine.log follows
2012-06-08 13:44:15,089 WARN  [org.ovirt.engine.core.bll.DetachNetworkToVdsGroupCommand] (ajp--0.0.0.0-8009-10) CanDoAction of action DetachNetworkToVdsGroup failed. Reasons:NETWORK_CANNOT_REMOVE_NETWORK_IN_USE_BY_VM,$NetworkName NET1
2012-06-08 13:44:29,865 INFO  [org.ovirt.engine.core.bll.MultipleActionsRunner] (ajp--0.0.0.0-8009-9) MultipleActionsRunner of type DetachNetworkToVdsGroup invoked with no actions