macosx: don't show the playlist on stop in minimized mode (refs #6213)

(cherry picked from commit 23d755550b26259906b9d36443f20c0e2f3f1b56)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/gui/macosx/MainWindow.m

@@ -598,7 +598,8 @@ static VLCMainWindow *_o_sharedInstance = nil;
     {
         if (b_splitview_removed)
         {
-            [self showSplitView];
+            if( !b_nonembedded ||( sender != nil && b_nonembedded))
+                [self showSplitView];
         }
 
         if (b_dropzone_active && ![[VLCMain sharedInstance] activeVideoPlayback])