Qt: InputManager: UpdateMeta() on Item change. (fix #7321)

(cherry picked from commit b54356d11dbafa1d3cce837b43faeedb9413941b)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/gui/qt4/input_manager.cpp

@@ -207,6 +207,7 @@ void InputManager::customEvent( QEvent *event )
             UpdateStatus();
             // UpdateName();
             UpdateArt();
+            UpdateMeta();
             /* Update duration of file */
         }
         break;