Only allow pictures taken within the last hour

A Blippa customer uses Forms to let the drivers upload a picture of the car after washing it.
Due to some problems with fake washes, the customer wanted to have a time limit set on the uploaded images.

So, now there is a new setting in Form: “Max image age in hours”.
Any image older than that will be rejected with an error message.

Note: This only works with jpg images and images uploaded from Apple Photos.