Bug: hitting enter/return in a form has unexpected behavior

[jarrighi]

When I fill out a form to spend money or add credit, and then hit return, the page is refreshed with no backend action.

For example,
If I click into a barter account,
then click on buy card,
then enter an 5 in the form input field,
then hit the return key on my keyboard,

Then
The account balance is not decreased by $5
The browser is refreshed and I returned to the search screen