[Musicxml export] - trill on rest not exported
This is extracted from an orchestral work, and the trill is strangely not exported. I looked into the mscx code, and found nothing which can stop exporting it. Other trill lines can be exported, but this one can't. Why? I just removed the Python script helping me to catch trill lines, and this again makes me afraid of missing trills in braille transcription, and I have to bring the script back.