Added `ENT.PhysicsSounds` for `anim` type SENTs
If set to true, re-enables physics impact sounds for the entity
Spawnmenu one click addon spawnlist generator
https://files.facepunch.com/rubat/1b1211b1/CPZbdPPd9F.png
Fixed IMaterial:GetKeyValues sometimes returning nothing on srcds
Material() now precaches the material, but only if it is not already precached.
Fixed a crash to do with static props when they change models
I.e. when a static prop goes from error.mdl to a more complex one.
Minor: Init variables used in IMaterial functions