Use hide() to remove messages from the mscs

asn1_value_editor/mscStreamingScene.py

@@ -147,6 +147,9 @@ class MscStreamingScene(MscGraphBasicMSCScene):
             item = self.visible_items.popleft()
             firstY = item.y()
             item.hide()
+            # Can't call removeGenericItem because it is not associated to
+            # the bMSC, as it was created with addMessage2. This flow should
+            # be clarified. This is a memory leak...
             #self.removeGenericItem(item)
             while len(self.visible_items) > self.max_items:
                 item = self.visible_items.popleft()