[devinemke]

there may be others, but 2 options that i know of are these:

1. while in Groups Keyboard Focus Mode hit Shift + ! to toggle the "ALL" group on/off (though i gather you do not want to be in Groups Keyboard Focus Mode?)
2. while in any Keyboard Focus Mode, make your selection not out on the Edit Window, but above it, in the timeline bar. this will select everything vertically, and thus you can do your shuffle edits across all tracks.

hope this helps.