QT6: Todo Fix QtConcurrent (remove KCoreAddons?)

sources/qetproject.cpp

@@ -16,11 +16,6 @@
 	along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#include <QTimer>
-#include <QStandardPaths>
-#include <utility>
-#include <QtConcurrent>
-#include <QHash>
 
 #include "qetproject.h"
 #include "diagram.h"
@@ -37,6 +32,13 @@
 #include "numerotationcontextcommands.h"
 #include "assignvariables.h"
 
+#include <QTimer>
+#include <QStandardPaths>
+#include <utility>
+#include <QtConcurrent>
+#include <QHash>
+#include <QtDebug>
+
 static int BACKUP_INTERVAL = 120000; //interval in ms of backup = 2min
 
 /**
@@ -1691,11 +1693,16 @@ NamesList QETProject::namesListForIntegrationCategory()
 */
 void QETProject::writeBackup()
 {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	QDomDocument xml_project(toXml());
-	QtConcurrent::run(QET::writeToFile,
-					  xml_project,
-					  &m_backup_file,
-					  nullptr);
+	QtConcurrent::run(
+				QET::writeToFile,xml_project,&m_backup_file,nullptr);
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	qDebug()<<"Help code for QT 6 or later";
+#endif
 }
 
 /**