Prevent submission while responses are in transit to server

[CarlosNZ]

We have had situations where the reviewer changed a review response from "Approve" to "Decline" and then submitted. But due to network connection problems, the "Decline" response hadn't actually been set on the server yet, which resulted in an invalid review state after submission.

We need to update it so that when submitting a response (application or review), the "Submit" button becomes disabled until response had been received from server confirming the update.