At the moment arrow keys 'left' and 'right' in inventory are duplicates of 'up' and 'down'.
Multiple keyboards on laptops and alternative platforms don't have PgUp and PgDn keys.
Would it be possible to either have the 'left'-'right' arrow keys to hop between groups* or to function as PgUp and PgDn keys?
*Weapons, Armour&Clothes, Containers, et cetera