Deal with recent Qt methods deprecation (#3801)

* Deal with recent Qt methods deprecation

 * Use std::sort, std::less instead of qSort/qLess
 * Use QFontMetrics::horizontalAdvance instead of ::width
 * Use qApp->primaryScreen() instead of QDesktopWidget
 * use lambas instead of QSignalMapper
 * Use QTreeWidgetItem::setForeground instead of ::setTextColor
 * Use QDir::setPath instead of operator=(QString)
 * Use QList::swapItemsAt instead of ::swap

* fix error

common/server_cardzone.cpp

@@ -59,7 +59,11 @@ void Server_CardZone::shuffle(int start, int end)
 
     for (int i = end; i > start; i--) {
         int j = rng->rand(start, i);
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 13, 0))
+        cards.swapItemsAt(j, i);
+#else
         cards.swap(j, i);
+#endif
     }
     playersWithWritePermission.clear();
 }