graphic refactoring

graphic buttons
menu for save and export
enable grid in config and save it in session
remove traceX traceY

utils/qpicalculator/mainwindow.cpp

@@ -76,7 +76,7 @@ void MainWindow::redrawGraphics() {
 		graphic->setGraphicData(pol, i);
 	}
 	graphic->setAutoUpdate(true);
-	graphic->update(true);
+	graphic->updateGraphics();
 }