wip: compiles again, after extensive jack rework

crates/device/src/clock/clock_model.rs

@@ -26,6 +26,8 @@ pub struct Clock {
     pub midi_out:  Arc<RwLock<Option<MidiOutput>>>,
     /// For emitting a metronome
     pub click_out: Arc<RwLock<Option<AudioOutput>>>,
+    // Cache of formatted strings
+    pub view_cache: Arc<RwLock<ViewCache>>,
 }
 
 impl std::fmt::Debug for Clock {
@@ -59,6 +61,7 @@ impl Clock {
             midi_in:   Arc::new(RwLock::new(Some(MidiInput::new(jack,   &"M/clock", &[])?))),
             midi_out:  Arc::new(RwLock::new(Some(MidiOutput::new(jack,  &"clock/M", &[])?))),
             click_out: Arc::new(RwLock::new(Some(AudioOutput::new(jack, &"click",   &[])?))),
+            ..Default::default()
         };
         if let Some(bpm) = bpm {
             clock.timebase.bpm.set(bpm);