Fix various mpd bugs

- Add elapsedTime and totalTime to tooltip format arguments
- Catch format exceptions and print error
- Copy mpd connection error message before it gets freed
- Update display after connection to mpd was lost

src/modules/mpd/state.cpp

@@ -341,6 +341,7 @@ void Disconnected::disarm_timer() noexcept {
 }
 
 void Disconnected::entry() noexcept {
+  ctx_->emit();
   arm_timer(1'000);
 }