Plan Buildings Without Materials - allow resource counts to go negative

[BenLubar]

Is your feature request related to a problem? Please describe.
Plan Buildings Without Materials is great, but I frequently don't know how much of a resource I'm missing. Do I need 100kg of refined copper or 10 tons?

Describe the solution you'd like
https://steamcommunity.com/sharedfiles/filedetails/?id=2615407383 basically this mod I made for RimWorld. Allow the amount of a resource that is reserved to exceed the total amount of that resource, and therefore have the displayed count on the sidebar go negative when not enough of the resource exists.