Auto-saving and depth layer improvements

This update improves the auto-saving process and enhances the depth layer gizmo, along with fixes for material blending issues.

Changes

• Improved auto-saving process.
• Improved depth layer gizmo.
• Fixed material blending issues when changing lighting mode.
• Fixed issues when undoing interaction state changes.
• Fixed issue with inlined textures when creating new states.
• Minor bug fixes.