- Added access (CanBeWritten) tracking to TStaticItem
- Moved TLandscape.UpdateStaticsPriorities to TStaticItem.UpdatePriorities
- Moved ULandscape.CompareWorldItems to UWorldItem
- Renamed TSeperatedStaticBlock.RefreshList to RebuildList
- Changed TStaticBlock.Sort to use CompareWorldItems and TList.Sort
- Some code style changes