Advanced Shelves - Larger Width and Greater Depth

Two shelf changes for consideration, going a long way to improve restocking issues. These shelves could be higher-level unlocks.

1. Larger width shelves, 1.5x or 2x width. A long small (item) shelf could hold 18 items across instead of 9, or even moreso because of the lack of a middle divider.

2. Double or triple depth shelves. This means multiple rows of products can be stored on a shelf, allowing for far more storage before running out. For example, a triple-depth and double-width small (item) shelf could hold 21 items a row x 3 rows = 63 items.

This addresses many stocker automation problems in the game:

1. Items are removed by customers faster than they can be restocked
2. boxes can hold 15 items but some shelves only hold 4, so restockers fill many shelves with 1 item
3. single customers buying an entire shelf of items at once
4. stockers refilling small shelves and constantly returning half-filled boxes to the stockroom
5. constantly needing to buy stock from the catalog