User creation bugfix, lesson create css fix

Fixed the user creation form when adding a parent to a student user -
forgot a $ symbol, how embarassing.
Also fixed the css for the lesson creation form, changed to an inline
div style and now displays as it should.
Removed payment link

Removed the payment link from the parent portal. As it has not been
implemented at this time (and is unlikely to be before the deadline) it
makes sense to remove this before user evaluations to prevent confusion.