Fixed stringtables on c3m3 and c3m4
fixed cubemaps on c3m3

Fixed collisionmesh on window prop

Made saferoom doors passable, by editing the metal models' collisionmesh.
Added Blockage for players on the roofs near the "Bridge Crescendo"
Added one more room to Plantation house so infected can swarm you easier.

(I watched some goons play this on expert realism and all they do is camp in OP spots during crescendos and finales. Bruh, play the game instead of sitting in a corner, waiting for a medal)

Modified C3M4_Plantation_dry.
-Added func_dustmotes in lobby
-Modified navmesh on roof, outise of LOS, to allow spawns on the roof.
-fixed survival item location