Description of problem:
If an unsynched network exists on a Host's NIC, in setup networks the 'edit network' dialog will all be greyed out until the "sync network" checkbox is checked.
When checked, all fields become editable, but if unchecked after that then they become greyed out and still contain the modified values.

Attached is a screenshot where the original state was 'boot protocol = none'.

I believe that in this state, if the user will click OK in the setup networks dialog he will get a can do action failure from the engine side which claims that unsynced networks cannot be edited unless synced.


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


How reproducible:
Always


Steps to Reproduce:
1. Have an unsynced network on a host's nic:
1.1. Attach network to a NIC.
1.2. Change the network MTU to something different.
2. In setup networks dialog for the host's NICs, click the pencil on the unsynched network.
3. Check the 'sync network' checkbox.
4. Change the boot protocol to something different.
5. Uncheck the 'sync network' checkbox.
  
Actual results:
The modified boot protocol values will remain in the edit dialog.


Expected results:
When unchecked, the values before checking the box should return.


Additional info:
This should also be the case if the checkbox is unchecked after the dialog was closed and open again.