528089b: remove preferred group filtering (leaving the setting in for later use) [Glenn Maynard]
96821ad: fix pump routine right side DownLeft not drawn [Chris Danford]
fd88c62: easier debug stepping [Chris Danford]
7534867: fix SSM crashes when selecting a song with only one player enabled
cddaab5: simplify SongUtil::GetStepsTypeAndDifficultyFromSortOrder
615aab0: add Style::GetUsesCenteredArrows (doubles + routine)
17f38e7: sanity check
[all code changes by Glenn Maynard]