GUI: face detection panel is no longer visible on start up

gui/src/aaregui/main_window.py

@@ -160,6 +160,7 @@ class MainWindow(QMainWindow):
         self.face_panel_dock.setWidget(self.face_panel)
         self.face_panel_dock.setAllowedAreas(Qt.DockWidgetArea.RightDockWidgetArea | Qt.DockWidgetArea.LeftDockWidgetArea)
         self.addDockWidget(Qt.DockWidgetArea.RightDockWidgetArea, self.face_panel_dock)
+        self.face_panel_dock.hide()
 
         self.setCentralWidget(top_widget)
 
@@ -346,12 +347,12 @@ class MainWindow(QMainWindow):
 
         show_face_panel_action = QAction("Show face detection", self)
         show_face_panel_action.setCheckable(True)
-        show_face_panel_action.setChecked(True)
-        show_face_panel_action.triggered.connect(self.face_panel_dock.setVisible)
-
+        show_face_panel_action.setChecked(False)
+        #show_face_panel_action.triggered.connect(self.face_panel_dock.setVisible)
+        show_face_panel_action.triggered.connect(lambda checked: self.face_panel_dock.setVisible(checked))
         self.face_panel_dock.visibilityChanged.connect(show_face_panel_action.setChecked)
         view_menu.addAction(show_face_panel_action)
-        # Help menu
+
         help_menu = menu_bar.addMenu("Help")
         about_action = QAction("About", self)  # Action for 'About'
         about_action.triggered.connect(self.show_about_dialog)