Cloud View: should be able to select running and stopped instances and stop the running ones

how to reproduce:

1) select stoped and started instances in the cloud viewer (control in the properties view that you have instances in both states)
2) open the context menu

Result:
Start is disabled in the context menu

Expected result:
Start is disabled, the instances that are stopped shall be started.

The same applies to all instance related action:

• start
• stop
• destroy
• reboot

of course, if there are several stopped instances, a dialog shall be opened and present only the stopped ones.