Added playlists view context menu for rename, lock/unlock, and delete.

Harmonia.WinUI/ViewModels/PlaylistItemViewModel.cs

@@ -35,6 +35,19 @@ public partial class PlaylistItemViewModel : ObservableObject
         }
     }
 
+    private bool _isLocked;
+    public bool IsLocked
+    {
+        get
+        {
+            return _isLocked;
+        }
+        set
+        {
+            SetProperty(ref _isLocked, value);
+        }
+    }
+
     public PlaylistItemViewModel(Playlist playlist)
     {
         Playlist = playlist;
@@ -55,6 +68,7 @@ public partial class PlaylistItemViewModel : ObservableObject
     private void UpdateMetaData()
     {
         Name = Playlist.Name ?? "Untitled Playlist";
+        IsLocked = Playlist.IsLocked;
 
         TimeSpan total = TimeSpan.FromSeconds(Playlist.Songs.Sum(s => s.Song.Length.TotalSeconds));
         Summary = $"{Playlist.Songs.Count} songs / {total:h\\:mm\\:ss}";