New items, new map, goal explosions in showroom

[Darxeal]

• added season 2 items
• added the Neon Fields map (to the list of standard maps and the background image)
  • needs to be added to the framework first, hopefully this PR will motivate @tarehart 😈
• added a new preset to the showroom - Goal explosion
  • this sets the car and ball in such a way that it instantly scores, so you can preview your goal explosion preset
  • it doesn't repeat automatically, but I enabled Skip replays so the user can repeat it manually quickly