Description of problem:
Unable to change the default worker machine pool definition to autoscaling enabled from a non ccs OSD multi-zone cluster via "Edit machine pool" option. User neither notified with an error nor able to save the definition from "Edit machine pool". The "Save" button always disabled even after changing definition.
See the recording EdiMachinePoolSaveAction.mp4

CLI action like below works fine

ocm edit machinepool --enable-autoscaling --min-replicas=9 --max-replicas=12 --cluster=awsosd13dec worker
 

How reproducible:

 Always

Steps to reproduce:

1. Launch OCM UI Staging.
2. Open a ready OSD non CCS multi-zone cluster.
3. Go to machine pools tab.
4. Select "Worker" machine pool and click on "edit" context menu.
5. Select the checkbox "Enable autoscaling".
6. Change Max node count values.
7. Try to save the machine pool definition and see the behavior.

Actual results:

The "Save" button from "Edit machine pool" dialog shown as disabled even after the change in machine pool definition.

Expected results:

The "Save" button from "Edit machine pool" dialog should be enabled when there is a change in machine pool definition. User should allow to save the valid machine pool definitions.