v2.3 - ComboBox Selection Fix

🐛 Fixes

• Fixed ComboBox selection in Server Settings (LevelType, Gamemode, Difficulty)
• ComboBox selections now persist correctly during background property refreshes
• LevelType detection now supports values like minecraft\:normal

✨ Improvements

• Applied modern dark theme styling to Server Settings ComboBoxes
• Implemented timestamp-based protection to preserve user selections
• ComboBox dropdown behavior now matches BackupSelect functionality
• Added proper color contrast to dropdown menus

🎨 UI Polish

• ComboBox styling aligned with application theme
• Consistent dropdown appearance across all tabs

📝 Notes

• No breaking changes
• Backward compatible with existing configurations