Improve "regroup rhythms" heuristics

As per support forum post:
https://musescore.org/en/node/284504

See attached screenshots showing a bar before and after "regroup rhythms". I prefer the tied eighths on the "before" screenshot, is it intended behaviour to collapse into a single quarter note that doesn't fall on beat?

(Marc Sabatella responds: FWIW, I prefer the before too in this case, feel free to submit an official bug report via the issue tracker (see Support menu above). I'd mark the severity as "minor" (to me, it's somewhere between that and "major" but we don't have such an option).

My personal preference would be for "regroup rhythms" function to convert the "AfterRegroup" grouping to the "BeforeRegroup" grouping, but I'd also be happy if the function left both groupings as they are.