Expand and clarify a bit within the section on strong typing and IntelliJ IDEA support.

This is a strange use case for `with {}` and I've never seen anyone using `with {}` on a *class*. You are explicitly delegating all calls within the closure to `HomePage` class not an instance. This most likely is not what you want. The fact that your IntelliJ provides you code completion is some kind of coincidence and it's an even bigger coincidence that it works for you, at least now.

Using `with {}` quite often ends up with hard to explain, unwanted behaviour and I don't want people to use it and then ask questions on the mailing list because something strange happens. I'm deeply opposed to this one, sorry.