[Play panel] Beat counter show number wrongly when has pick-up measure

Nightly build for Version: 2.0.1
GIT commit: 35e2f4d

Reproduce step:

- Create the score with: time-signature 4/4, pick-up measure 2/4 (File > New...)
- Open Play panel window (View > Play panel)
- Play score from beginning, track on the beat count and realize that:
when play through pick-up measure to next measure, the beat count
don't turn 1 at next measure.

Note: The bug don't occur if you create score with pick-up measure -> close it -> and reopen it