Render track artist when they don't match album artist

Mac/Components/Browser/Album Detail/AlbumDetailView+NSTableViewDelegate.swift

@@ -83,7 +83,14 @@ extension AlbumDetailView: NSTableViewDelegate {
       owner: self
       ) as! NSTableCellView
 
-    cellView.textField?.stringValue = song.title
+    if song.artist != song.album.artist {
+        let string = NSMutableAttributedString()
+        string.append(NSAttributedString(string: song.title))
+        string.append(NSAttributedString(string: " – " + song.artist, attributes: [.foregroundColor: NSColor.secondaryLabelColor]))
+        cellView.textField?.attributedStringValue = string
+    } else {
+      cellView.textField?.stringValue = song.title
+    }
 
     return cellView
   }

Shared/MPDClient/Extensions/MPDClient+Album.swift

@@ -73,7 +73,7 @@ extension MPDClient {
 
       let mpdAlbum = MPDAlbum(
         title: mpdSong.album.title,
-        artist: mpdSong.artist,
+        artist: mpdSong.album.artist,
         firstSong: mpdSong,
         date: mpdSong.date
       )

Shared/MPDClient/Models/MPDSong.swift

@@ -36,17 +36,22 @@ extension MPDClient {
     var album: MPDAlbum {
       return MPDAlbum(
         title: getTag(.album),
-        artist: artist,
+        artist: albumArtist,
         date: date
       )
     }
 
     var artist: String {
-      if getTag(.albumArtist) != "" {
-        return getTag(.albumArtist)
-      } else {
-        return getTag(.artist)
-      }
+      return getTag(.artist)
+    }
+
+    var albumArtist: String {
+        let albumArtist = getTag(.albumArtist);
+        if albumArtist != "" {
+          return albumArtist
+        } else {
+          return artist
+        }
     }
 
     var date: String {