Issue description
Hi,
When you have two hospitals one with Medical Supplies I and the other with Medical Supplies II you will get a weird bug where the unity display in the pop overview is jumping from 1.0 to 1.5 and reverse.
As a player I would expect that it sums up the unity and or gives me feedback that only the higher medical supply is used.
Reproduction steps
When you have two hospitals one with Medical Supplies I and the other with Medical Supplies II
Game version and build number
v0.8.7d
Operating system
Windows