Title says it all. I'm tired of mashing the E key to bet the max. Why was this feature overlooked for roulette only?

I know its a bit of a necro... but I love the dead!

I just was getting back in to New Vegas after taking some time off. I would also like this option as well.
I've been looking at the Xml's for the roulette and blackjack interfaces but i cant seem to make heads or tails of it