add max_volume to furniture and use that instead of MAX_VOLUME_IN_SQUARE
add max_volume to furniture.json, mostly the default 4000, mostly
add NOITEM flag to t_hole
Extend the max_volume setting to terrain
show maximal volume for terrain7furniture and for vehicle parts in advanced inventory
use MAX_VOLUME_IN_SQUARE directly instead of using -1 as placeholder for it
Remove unused definition of MAX_VOLUME_IN_VEHICLE_STORAGE
Use furniture max volume, if there is furniture.

Remove an outdated comment now.
Merge pull request #7115 from BevapDin/give-furniture-max-volume

Give furniture max volume