Automatically shorten pickup measures

I think it’d be neat if the empty beats in pickup measures were automatically cut off when posted as a TheoryTab.

For example, I think it’d look better if this pickup measure cut out the first two empty beats, and started on beat 3 because that’s the first whole beat that has any notes.
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This makes sense to me when considering how sheet music does not display the entire pickup measure, just the relevant beats (example below)
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