Hotfix 1.2.1c

[h3]Bug fixes:[/h3]

• Fixed an issue where the Difficulty settings menu was displayed incorrectly at certain screen resolutions. (thanks to UndecidedTrout for the report);
  
• Fixed a bug where the player couldn’t use Esc to leave the Keyboard controls menu after rebinding a button (thanks to UndecidedTrout for the report);
  
• Fixed an issue where UI elements at the top and bottom of the Controls settings menu were not visible;
  
• Fixed a bug that caused the Yes, No, and Cancel buttons in the Apply settings window to appear as white rectangles;
  
• Resolved a problem where using Threat analyzer at level 4 with the Claustrophobia safe mode enabled would cause most tiles to become invisible (thanks to for 肯定ペンギン the report);
  
• Addressed a situation where loading backups multiple times after completing the game could cause the boss fight becoming unavailable (thanks to UndecidedTrout again for the report).