Simple a/b amp switch

I'm sure I've seen this requested before but it would be really useful to have the option to plug in a single momentary or latching amp style channel foot switch and assign one profile to on and another to off.

This would be a really great simple feature which I'm sure would be super easy to integrate. Please make it happen!

Quote from troynova

This can easily be done with a two button switch now.

Except I just want to use a standard single switch pedal. I have a rig up down pedal and it is no where near as straight forward as a on off footswitch. In space and in functionality.