i3 config: Add Mod+Shift+Tab to switch workspace outputs
i3 config: Add Mod+Shift+Tab to switch workspace outputs

I'm not convinced that this is the best choice of keybinding for this,
but I need the functionality before I go insane.

DarkStarSword/junk,DarkStarSword/junk,DarkStarSword/junk,DarkStarSword/junk,DarkStarSword/junk