Fix metronome status bar button

Apply the state of the metronome status bar button on startup.  This
ensures the GUI is in sync with the client.

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Set clipsort.log filename if saving session

Don't forget to set up the clipsort.log filename so the client records
ogg file interval information.

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>