[REQ] MarketPress - Add class="button" to all buttons

We use lots of themes that now have CSS code specifically for buttons.

It makes all the buttons on a website look nice and uniform, with colors, gradients, etc.

The only problem is that the CSS looks like this:

.button {
CODE HERE
}

Can you assign class="button" to all the submit buttons in MarketPress to make it easier for theme designers?

(Please, oh pretty please!)