Regression: Editing freeldr.ini in ROS notepad makes ReactOS unbootable

Steps to reproduce:

1. Navigate to C:\ and open freeldr.ini (will be opened with ROS notepad)
2. Set DefaultOS value to ReactOS_Debug (or any other possible value)
3. Hit Ctrl+S or choose "Save" in the main menu
4. Normally reboot the system via Start menu

Expected result: System is bootable, and default freeldr menu item is changed.

 Observed result: System is not bootable anymore.

 Actual reason: Notepad adds UTF-8 BOM at the beginning of freeldr.ini, though the file was never encoded with UTF-8 text encoding. This didn't happen some time before, so it's a regression.