Ability to rename JIRA Service Desk approval buttons on customer portal

When configuring approval statuses in JIRA Service Desk workflows, the buttons that display to the customer on the portal are always named Approve or Decline.

Although an approval has been specified in the workflow, this default text is certainly not always appropriate for our users. As such, an easy way to change this default text to anything that we wish would be very welcome for us, and I'm sure for many other users.