Scenario: Fix contextual menu.

src/View/Scenarios/ContextMenu.py

@@ -71,7 +71,9 @@ class ScenarioMenu(AbstractMenu):
                 )
 
         action = self._exec()
-        if action == select:
+        if action == None:
+            return
+        elif action == select:
             self._parent.select_scenario(item)
         elif action == delete:
             self._parent.delete_scenario(item)