Oops forgot a mutex locker in progress column sorting

src/GUI.cpp

@@ -452,6 +452,7 @@ void GUI::displayInfoBarMenu(const QPoint& pos){
 
 void GUI::sortProgressColumnDelayed() {
     if(delayedSorting){
+      QMutexLocker lock(&DLListAccess);
       sortDownloadListFloat(PROGRESS, delayedSortingOrder);
       qDebug("Delayed sorting of progress column");
       delayedSorting = false;