macosx: fixed unresponsive playlist correlated to video playback (fixes #5871)

(cherry picked from commit 3ab77917)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/gui/macosx/MainWindow.m

@@ -559,11 +559,13 @@ static VLCMainWindow *_o_sharedInstance = nil;
         if ([o_video_view isHidden] && [o_playlist_btn isEnabled]) {
             [o_split_view setHidden: YES];
             [o_video_view setHidden: NO];
+            [self makeFirstResponder: o_video_view];
         }
         else
         {
             [o_video_view setHidden: YES];
             [o_split_view setHidden: NO];
+            [self makeFirstResponder: nil];
         }
     }
     else
@@ -1193,6 +1195,8 @@ static VLCMainWindow *_o_sharedInstance = nil;
     }
     if (b_videoPlayback)
         [self makeFirstResponder: o_video_view];
+    else
+        [self makeFirstResponder: nil];
 }
 
 - (void)resizeWindow

modules/gui/macosx/VideoView.m

@@ -304,8 +304,7 @@ int DeviceCallback( vlc_object_t *p_this, const char *psz_variable,
 
 - (BOOL)resignFirstResponder
 {
-    /* We need to stay the first responder or we'll miss some
-       events */
-    return NO;
+    /* while we need to be the first responder most of the time, we need to give up that status when toggling the playlist */
+    return YES;
 }
 @end