Disclaimer
I'm pretty sure this is on your list of todos already, but I thought I would open a ticket for completeness.

Current Behavior
When you have 1 or 0 empty bag space (Bag or bank) there is no way of knowing if there is any left since it shows the same. When #free slots > 1 there is a little number on the bottom right to indicate the amount of free space.

Expected Behavior
Multiple ways are possible here. The easiest would probably be to be consistent and just show a little '1' when there is one empty slot left. However fro
m UX perspective zero empty bag slots as this:

might still not be ideal.

So a combination could be a good approach:

• Show a little '1' for 1 bag slot left
• Adjust the color of the slot to be red to indicate no empty space left
• Alternatively show a little '0' for no bag slots left

Examples:

Free spaces now show a 1 or 0 on the Free Space slot where there are 1 or 0 slots open.