Sniper rifle training: Fix missing victory sound, also disable controls at the end
String freeze notice: This commit will display a caption with the string "Victory!".
It does NOT violate the string freeze, as this string is already present in stub.lua.
AAAAaXicAWkAlv8ITgKBAAmqA0YACZMErAAISQV1AAbfBXoABZEEsAAFVQM9AAbWAoYAB5cAqpkHlwc7AAMmA/WZDB4D9QADtAEBmQtiBvIAA7kHCZkLawD8AA2jAaaFDboGDYUBhQYthQGPAlSFB6AEC/E0HxtP