Item bag slots count display

[aliblong]

"Show bag slots used" feature

This feature, when enabled, paints in the top right corner of a merged unstackable the count of bag slots underlying it.

Example

Example with an item that stacks to 10: this bag view becomes with "merge unstackable" enabled, then with "don't merge partial" enabled.

Feature toggle

The feature toggle is grouped with the rest of the "Stacking" features (separately between backpack and bank). What it looks like in the backpack options:

Tests

I've checked that this feature interacts correctly with all other stacking features, in both backpack and bank, in both classic era (SoD) and retail.

[Frici42]

That's quite a neat idea, I was hoping to see that included in a future rellease 😄 (esp as a number of things in DF fit this exact criteria in DF right now)