Fix validation copy

[noisecapella]

Forgot to fix this before #504 was merged. From #504 (comment)

For the first one, I think it would be good to give the user some guidance on what to do, e.g.

"A Master's Degree is required if the Master's Degree switch is on. Click the + button to add a degree or switch it off"

... that's probably too long though.

What's the user supposed to do in the 2nd case, on L103?

[noisecapella]

Here's what I have so far. It needs some work, any comments so far?

[roberthouse54]

To be honest, I wonder if we can hold off on this. I feel that I want to probably redesign this sign up flow in a way to get rid of the switches completely. The switches UI paradigm makes no sense to me.

[Ferdi]

OK to redesign but can we put some text there until that happens?

[roberthouse54]

OK, go with this then:

eg.

"Master's Degree is required if the switch is on. Please add a degree or switch it off."

Also, please make sure the text is aligned with the header above it. It is a bit too far left.