[Steam Big Picture] No Secondary Fire for Melee Mode - Hysterical Assault Unusable

[castem]

Right now, when you customize a DS4 control scheme in Steam Big Picture mode for Warframe, the Melee Mode doesn't have Secondary Fire in the list of options you can select for a button.

As a result, Valkyr's Hysterical Assault augment (activated by pressing Secondary Fire while in Hysteria, a melee mode) is unusable - you literally can't use it as there's no Secondary Fire button to press or assign.

Could this be fixed?  I imagine all you'd need to do is let Secondary Fire be an option to select while in the Melee Mode tab of Big Picture Mode's controller configuration.