public GroupEditor(MetadataFile metadata)
{
MadeChanges = false;
Metadata = metadata;
InitializeComponent();
List <SongEntry> remainingSongs = Metadata.Songs.ToList();
foreach (GroupEntry g in Metadata.Groups)
{
PopulateGroup(null, g, remainingSongs);
}
foreach (SongEntry e in remainingSongs)
{
SongList.Items.Add(e);
}
GroupList.ExpandAll();
UpdateControlAvailability();
}