Moving spotlight section on people page

[johnmildinhall]

The spotlight should move to where the user is scrolled to, rather than the other way around. This means that when the user clicks on a person at the bottom, the spotlight section changes to that person, and moves so that the top is aligned with the top of the browser window.

[taktran]

The problem with making the spotlight image static is that when there is too much information underneath the image, we'd need a scrollbar for vertically small screens (@markdurrant is a NO! to scroll bars)

We should look at how we can make the experience more fluid, or maybe change the layout of things on the page.