When the visualization window is not open, it should not continue to run
the scene until the app is quit. Apparently, the windowed mode is really
slow on old Intel machines, too. Full screening it is enough to bodge
the entire system session until the machine is remotely rebooted.
Signed-off-by: Christopher Snowhill <kode54@gmail.com>
Add a dedicated spectrum visualization window, and add the necessary
hooks to start its event timer if playback is already running when it is
first opened.
Signed-off-by: Christopher Snowhill <kode54@gmail.com>