This is somewhat self-explanatory, but I would love if instead of Shift-M selecting random notes, it selected all MUTED notes in the pattern. Alt-M mutes all selected notes, and Shift-Alt-M unmutes them, so having Shift-M select them seems logical. Additionally, selecting all muted notes is much more useful/frequent then selecting multiple random notes, so it makes sense from an efficiency perspective as well.
I know people have asked for the ability to manually change hotkeys, and yes I agree that would be nice, but altering Shift-M specifically would be a very small but very helpful change.
Change Shift-M to "Select Muted"
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