Added a window entry on the bar for the currently displayed window. If
it annoys me I will delete it again but it helps distinguish the active
and the inactive output.
Also added the current river *mode* which is a lovely feature to have,
though I would like to hide it if no mode (other than normal) is
currently active.
Since the existing wayland module basically describes everything about
my 'desktop environment' setup already anyway, might as well rename it
accordingly. Additionally, mako is important for notifications in this
environment so it moves here as well.
