MusicDatabase::ImportKaraokeInfo: replace file loading with "LoadFile()"
KaraokeLyricsCDG::Load: load file by 'LoadFile()'
KaraokeLyricsTextUStar::readFile: replace file loading with "LoadFile()"
KaraokeLyricsTextLRC::Load: replace file loading with "LoadFile()"
KaraokeLyricsTextKAR::Load: replace file loading with "LoadFile()"