Full-screen mode is pleasantly exclusive, so we only need to send the
incoming mouse events to the active full-screen window.
This fixes an issue where clicking on the area normally covered by
the menubar while in full-screen mode would not send mouse events to
the full-screen window.
When the user opens a context menu by right-clicking on something,
we now immediately stop sending mouse events to whoever was doing
active input window tracking before.
There are probably more situations where we should do this, and maybe
there's also a more generic way to express it, but this works for now.
It didn't feel right to have a "DHCPClient" in a "Servers" directory.
Rename this to Services to better reflect the type of programs we'll
be putting in there.
