disable custom plot adists

src/View/Results/WindowAdisTS.py

@@ -402,6 +402,8 @@ class ResultsWindowAdisTS(PamhyrWindow):
             "action_export": self.export,
         }
 
+        self.find(QAction, "action_add").setEnabled(False)
+
         for action in actions:
             self.find(QAction, action).triggered.connect(
                 actions[action]