Dump object sets all the way up to 0x1f for all entities

[city41]

object sets can go all the way up to 0xff. After testing this with WoodFloor, it was found in far more object sets, sometimes with different (but usable) palettes.

To increase the chances of entities being compatible, should do full dumps for all entities up to 0xff. Sadly this means each dump will take about an hour, so wonder if can speed this up somehow.

[city41]

object graphic sets really only go up to 0x1f because the object header only has 5 bits to store them.

there are some objects with graphic sets in these higher areas, such as topiary plateau and tank treads. so we do need to redump all objects, but probably only up to 0x20