The inline edit confirm button should be disabled until quantities are changed
It doesn't make sense to allow confirming the inline edit when quantities weren't edited or when there are validation errors.
At the moment it's blocked by:
The patternfly-react components don't publish props for disabling the buttons.
The subscriptions page currently uses a message dialog as s workaround to prevent sending invalid values. That should be removed once we can use correct solution from patternfly-react.