Add support for 'fake' buttons using role=button on arbitrary elements
Use span fake button for Terms & Conditions link to allow line wrapping
Align Terms & Conditions checkbox & text w/ other inputs

Also align subsequent lines with the first.
Change layout of register captcha to position buttons below image
Fix 2 points from Berts PR review

- Re-add German translation for the captcha error
- Use pull-right rather than custom style w/ float: right.