Allow using a custom combination of different tools to calculate required tools on damageinfo

[Nothing4You]

E.g. you want to use 2 satchels on a sheet metal door, then you want to do the remaining damage with a beancan and as many bone clubs as needed.

Ideally it should be possible to show like steps of the calculation, like putting a beancan on a door does x amount of damage, so 250-x damage still need to get applied.

[Skippeh]

I thought of something similar too but haven't gotten around to implementing it. I'll look into it.