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)

Conflicts:
	tests/Adapter/GlobalCollect/RealTimeBankTransferIdealTestCase.php
	tests/DonationInterfaceTestCase.php
	tests/FormChooserTestCase.php

Change-Id: I46d16276015d16e2557f6042664ccca93f7beabe