Chaoshead v2.22.0

• Added safer lhs writing (closed #127):
  • It first moves the original file to ch-backup-[random number]-[original]
  • It then writes as normal
  • It then verifies the written file has the structure of a valid .lhs file
    • It might not necessarily be a valid level, but it would be valid enough to open in the hex inspector and debug what went wrong and recover data
  • On success: remove the backup
  • On failure: report a verbose error message to the user, including the location of the backup file
• Mention custom LH installation directory setting when patching (closed #125)
• Added a "dismiss" button to the save_data change beeper