When song duration is active, add way to pause rather than stop

When in song duration/ by time mode, it would be useful to have the pause button actually pausing the run and not stopping altogether. Maybe a separated button for stopping the run and pausing it would be a nice way to solve the issue

Great idea... that makes a lot of sense... hmmmm good question how we achieve that though. I'll add it to my design to-dos :)

Maybe like this

(Understand a extra stop button would be more flexible but we also don't want to clutter the metronome user interface with too many controls... but that could also still be a good option if it only appears while song duration is active)