replace use of depreciated QDesktopWidget in GUI * gui-utils.cc: include QApplication, QRect and QScreen; (get_screen_geometry): return QRect with geometry of primary screen; (adjust_to_screen): adjust given QRect to be completely on the screen that contains the largest part of the QRect, use a default geometry if no part is on an available screen * gui-utils.h: include QRect; new function get_screen_geometry and adjust_to_screen * community-news.cc: do not include QDesktopWidget, but gui-utils.h; (get_screen_geometry); move function to gui-utils.cc; * community-news.h: move get_screen_geometry to gui-utils.h * find-dialog.cc: do not include QDesktopWidget, but gui-utils.h; (restore_settings): use new function adjust_to_screen * main-window.cc: do not include QDesktopWidget, but gui-utils.h; (get_screen_geometry: move function to gui-utils.cc * main-window.h: move function get_screen_geometry to gui.utils.h; * octave-dock-widget.cc: do not include QDesktopWidget, but gui-utils.h QScreen and QWindow; (handle_settings): use adjust_to_screen and QGuiApplication->primaryScreen * release-notes.cc: do not include QDesktopWidget, but gui-utils.h and QScreen; (get_screen_geometry): move to gui-utils.cc; * release-notes.h: move get:screen_geometry to gui-utils.h * terminal-dock-widget.cc: do not include QDesktopWidget but QScreen; (terminal_dock_widget): use QGuiApplication->primaryScreen instead of QDesktopWidget->screenGeometry * welcome-wizard.cc: remove include of QDesktopWidget

--- a/libgui/src/main-window.cc	Mon May 16 23:00:27 2022 +0200
+++ b/libgui/src/main-window.cc	Sun Jan 30 16:41:44 2022 +0100
@@ -35,7 +35,6 @@
 #include <QDateTime>
 #include <QDebug>
 #include <QDesktopServices>
-#include <QDesktopWidget>
 #include <QFileDialog>
 #include <QIcon>
 #include <QInputDialog>
@@ -69,6 +68,7 @@
 #include "gui-preferences-nr.h"
 #include "gui-preferences-sc.h"
 #include "gui-settings.h"
+#include "gui-utils.h"
 #include "interpreter-qobject.h"
 #include "main-window.h"
 #include "news-reader.h"
@@ -2729,15 +2729,6 @@
        });
   }
 
-  // Get size of screen where the main window is located
-  void main_window::get_screen_geometry (int& width, int& height)
-  {
-    QRect screen_geometry = QApplication::desktop ()->availableGeometry (this);
-
-    width = screen_geometry.width ();
-    height = screen_geometry.height ();
-  }
-
   void main_window::resize_dock (QDockWidget *dw, int width, int height)
   {
 #if defined (HAVE_QMAINWINDOW_RESIZEDOCKS)