Improve looting game loop by improving sell mechanic at shops

[tklenke]

Enhancement description

Looting and selling game loop is not fun. This is due to how very painful it is to sell at shops

Alternatives you've considered

Option A - sort the items in a shop by category. E.g. all scopes, magazines, pistols grouped

Option B - sort the items alphabetically

Option C - have player drop items into floor near cash register then have option in cash register to buy items in vicinity

Option D - make ammo box next to cash register and have player put items to sell in the ammo box. Then option in cash register to buy.