Display number of empty slots stacked

[Biomedic32]

Is your feature request related to a problem? Please describe. When using the Empty Slot 'stack' feature for items, you dont know if you actually have a single slot left or you have 100+ until you actually hit max.

Describe the solution you'd like Display the total number of empty slots stacked

Describe alternatives you've considered Using a higher hidden stack count, but that still has the same issue just lets you see when you are under 5 slots vs at cap