Enhance Highlight Buffs plugin after v0.6 Round 5

[davidryan59]

Various enhancements:

• Made the highlights update on a timer (e.g. if viewport moves) - no more turning it off and on again to update!
• 3 new buttons relating to v0.6 Round 5 (enabled by default)
  • Half Junk
  • Needs Capture
  • Spaceships
• 2 new buttons relating to DF DAO Grand Prix (disabled by default, DF DAO can re-enable in their environment)
  • Target
  • Spawn
• Put the most important user configurable options to the top