Revert "Remove workaround". Required since we also support Qt4 in this branch.

This reverts commit 2ba3104337.

src/app/application.cpp

@@ -104,6 +104,14 @@ Application::Application(const QString &id, int &argc, char **argv)
     SettingsStorage::initInstance();
     Preferences::initInstance();
 
+#if defined(Q_OS_MACX) && !defined(DISABLE_GUI)
+    if (QSysInfo::MacintoshVersion > QSysInfo::MV_10_8) {
+        // fix Mac OS X 10.9 (mavericks) font issue
+        // https://bugreports.qt-project.org/browse/QTBUG-32789
+        QFont::insertSubstitution(".Lucida Grande UI", "Lucida Grande");
+    }
+#endif
+
     setApplicationName("qBittorrent");
     initializeTranslation();