- Added unique sprite sprites for custom rows/circles of items
- Set default values for hoops and custom rows/circles of items

- Add tooltips to some thing/line arguments
- Pushable things now have a unique color (brown)
- Changed some other thing colors

- Rename some linedef actions and arguments
- Reorganize thing types, increase color use
- Organize common config

- Add category-wide args to individual things, since they don't work (yet)
- Remove 3D mode start since it doesn't seem to work anyway

- Change some category colors
- Use newly added internal sprites