tests: add a bunch of tests about the focus conversation
tests: add a bunch of tests about the focus conversation

As noted in the previous commit, we still don't really implement the focus
model entirely correctly. But these bits I believe we do actually implement
correctly, so let's make sure we don't regress.

Signed-off-by: Tycho Andersen <6b523322678240882acbb4da5312a12d8cd0082d@tycho.ws>

ramnes/qtile,ramnes/qtile,qtile/qtile,qtile/qtile