v0.3.0

• Reworked UI theming of the hints area with a "dark" theme, variants planned
  for future releases
• Hint and hint group improvements:
  • Changed hint group headers to buttons for better usability
  • Improved categorization of hint classes
    • Locations now properly use flags for better filtering
    • Locations deemed barren have their respective item hints filtered out
  • All location symbols unified in a 3-letter style (BOTW → BTW)
  • Reworded most hints of presets
• Removed obsolete "Standard S5" preset