RTBT: Fixed some issues with the form template for iDeal.

Sadly, it seems that commenting out selects in a particular
way in the HTML templates will cause a function in RapidHTML to
explode.

@TODO: Backend tests for all in-use forms, before we intend to use them
@TODO: Comment detection in RapidHTML->fix_dropdowns
...or just rip the whole thing to pieces and start over (Yesplease)

Change-Id: I57179011d325b7fed53bb84a79e39570eec4047d