eliminate unnecessary uses of octave_qobject in GUI classes * BaseControl.cc, BaseControl.h, ButtonControl.cc, ButtonControl.h, ButtonGroup.cc, ButtonGroup.h, Canvas.cc, Canvas.h, CheckBoxControl.cc, CheckBoxControl.h, Container.cc, Container.h, ContextMenu.cc, ContextMenu.h, EditControl.cc, EditControl.h, Figure.cc, Figure.h, GLCanvas.cc, GLCanvas.h, ListBoxControl.cc, ListBoxControl.h, Menu.cc, Menu.h, Object.cc, Object.h, Panel.cc, Panel.h, PopupMenuControl.cc, PopupMenuControl.h, PushButtonControl.cc, PushButtonControl.h, PushTool.cc, PushTool.h, RadioButtonControl.cc, RadioButtonControl.h, SliderControl.cc, SliderControl.h, Table.cc, Table.h, TextControl.cc, TextControl.h, ToggleButtonControl.cc, ToggleButtonControl.h, ToggleTool.cc, ToggleTool.h, ToolBar.cc, ToolBar.h, ToolBarButton.cc, ToolBarButton.h, annotation-dialog.cc, annotation-dialog.h, qt-graphics-toolkit.cc, qt-graphics-toolkit.h, command-widget.h, community-news.cc, community-news.h, documentation-bookmarks.cc, documentation-bookmarks.h, documentation.cc, external-editor-interface.cc, external-editor-interface.h, find-files-dialog.cc, find-files-dialog.h, graphics-init.cc, graphics-init.h, interpreter-qobject.cc, file-editor.cc, find-dialog.cc, find-dialog.h, main-window.cc, main-window.h, news-reader.cc, news-reader.h, octave-qobject.cc, release-notes.cc, resource-manager.cc, set-path-dialog.cc, set-path-dialog.h, shortcut-manager.cc, shortcut-manager.h, welcome-wizard.cc, welcome-wizard.h, workspace-model.cc: Don't store references to octave_qobject in GUI classes where it is no longer needed. Eliminate unnecessary octave_qobject constructor arguments. Change all uses.

--- a/libgui/graphics/Menu.cc	Sun Dec 04 22:56:23 2022 -0500
+++ b/libgui/graphics/Menu.cc	Sun Dec 04 22:57:02 2022 -0500
@@ -36,8 +36,6 @@
 #include "Menu.h"
 #include "QtHandlesUtils.h"
 
-#include "octave-qobject.h"
-
 namespace octave
 {
 
@@ -63,7 +61,7 @@
   }
 
   Menu *
-  Menu::create (octave::base_qobject& oct_qobj, octave::interpreter& interp,
+  Menu::create (octave::interpreter& interp,
                 const graphics_object& go)
   {
     Object *parent_obj = parentObject (interp, go);
@@ -73,16 +71,16 @@
         QObject *qObj = parent_obj->qObject ();
 
         if (qObj)
-          return new Menu (oct_qobj, interp, go, new QAction (qObj),
+          return new Menu (interp, go, new QAction (qObj),
                            parent_obj);
       }
 
     return nullptr;
   }
 
-  Menu::Menu (octave::base_qobject& oct_qobj, octave::interpreter& interp,
+  Menu::Menu (octave::interpreter& interp,
               const graphics_object& go, QAction *action, Object *xparent)
-    : Object (oct_qobj, interp, go, action), m_parent (nullptr),
+    : Object (interp, go, action), m_parent (nullptr),
       m_separator (nullptr)
   {
     uimenu::properties& up = properties<uimenu> ();