check attr exist in gui remove all docs

csaxs_bec/bec_ipython_client/plugins/flomni/gui_tools.py

@@ -101,7 +101,8 @@ class flomniGuiTools:
         # dev.cam_flomni_overview.stop_live_mode()
         # dev.cam_flomni_gripper.stop_live_mode()
         # dev.cam_xeye.live_mode = False
-        self.gui.flomni.delete_all()
+        if hasattr(self.gui, "flomni"):
+            self.gui.flomni.delete_all()
         self.progressbar = None
         self.text_box = None