Page UP and Page DOWN in the MIDI assignable navigation buttons in MIDI panel.

When browsing for a song, I find it easier to view a static list and flip thru pages rather then scrolling and trying to view the moving list.

Along the lines, a MIDI button for "put library in focus"
and a MIDI button for "put crate in focus"

I realize that "tab" works to change focus, but two dedicated buttons for each view would be quicker (not needing to see first which is in focus)