Add a Customise window: toolbars, shortcut bar, keyboard, gestures

Configuration > Personnaliser... (also at the bottom of a toolbar's
right-click menu) opens one window with a tab for each page that sets
how the user works: Barres d'outils, Contenu des barres, Barre de
raccourcis, Raccourcis and Gestes de la souris, like SolidWorks'
Tools > Customize. The tabs are the same pages the configuration
dialog shows, which keeps them. OK applies every tab, Cancel none.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

sources/qetapp.cpp

@@ -45,6 +45,8 @@
 #include "ui/configpage/shortcutbarconfigpage.h"
 #include "ui/configpage/toolbarsconfigpage.h"
 #include "ui/configpage/toolbarcommandsconfigpage.h"
+#include "ui/customizedialog.h"
+#include <QTabWidget>
 #include "machine_info.h"
 #include "TerminalStrip/ui/terminalstripeditorwindow.h"
 #include "qetversion.h"
@@ -2258,6 +2260,36 @@ void QETApp::configureQET()
 #endif
 }
 
+/**
+	@brief QETApp::customizeQET
+	Open the Customise window: the toolbar, shortcut bar, keyboard and
+	gesture pages of the configuration dialog, as tabs of one window.
+	@param tab : the tab to show first
+*/
+void QETApp::customizeQET(int tab)
+{
+	QWidget *parent_widget = qApp->activeWindow();
+
+	CustomizeDialog dialog;
+		//Same reason as the configuration dialog (#527)
+	dialog.setWindowModality(Qt::ApplicationModal);
+	dialog.addPage(new ToolbarsConfigPage());
+	dialog.addPage(new ToolbarCommandsConfigPage());
+	dialog.addPage(new ShortcutBarConfigPage());
+	dialog.addPage(new ShortcutsConfigPage());
+	dialog.addPage(new GesturesConfigPage());
+	if (auto *tabs = dialog.findChild<QTabWidget *>(QStringLiteral("customizeTabs"))) {
+		tabs->setCurrentIndex(tab);
+	}
+	QET::trackDialogGeometry(&dialog);
+
+	if (parent_widget) {
+		dialog.setParent(parent_widget, dialog.windowFlags());
+	}
+	dialog.exec();
+	dialog.setParent(nullptr, dialog.windowFlags());
+}
+
 /**
 	@brief QETApp::exportConfiguration
 	Save the settings of QElectroTech to a file the user chooses, to keep