macosx: hide the playlist without option click when showing the video in a...

macosx: hide the playlist without option click when showing the video in a separate window (refs #6213)
(cherry picked from commit 566b0cd4405f9c9022789ce43c86ec5ee4753acf)

modules/gui/macosx/MainWindow.m

@@ -590,7 +590,7 @@ static VLCMainWindow *_o_sharedInstance = nil;
 
 - (IBAction)togglePlaylist:(id)sender
 {
-    if ((([[NSApp currentEvent] modifierFlags] & NSAlternateKeyMask) != 0) && !b_splitview_removed)
+    if ( ((([[NSApp currentEvent] modifierFlags] & NSAlternateKeyMask) != 0) && !b_splitview_removed) || (b_nonembedded && [[VLCMain sharedInstance] activeVideoPlayback] && sender != nil) )
     {
         [self hideSplitView];
     }