Description of problem:
While the VM is running, in the "Edit Virtual Machine" window, under the "Host" tab, the info tooltip message says that you can't edit the "Start Running On" fields, but it is not greyed out.
Look at the "Steps to Reproduce" section for an example to a scenario that should not happen.

Version-Release number of selected component (if applicable):
Built from source with commit e71e719e0f8e90b30fb0f7c57ce7de4b07cb963d.

How reproducible:
100%

Steps to Reproduce:
1. Edit a running VM from the UI - navigate to the "Virtual Machines" tab, click on a specific VM and then on "Edit".
2. Navigate to the "Host" tab.
3. Change the current selection under the "Start Running On" section.
4. Click OK, watch the misleading message "Some of the changes will be applied after the NEXT RESTART." and click OK.
5. Whatever you do, your change is gone (you can repeat steps 1 and 2 before or after shutting down the VM and see that the change is not saved).

Actual results:
The change you have made is not saved.

Expected results:
The "Start Running On" fields should be greyed out, or a proper message should be shown.

Additional info: