Fix compilation issues due to inappropriate QString usage

src/gui/properties/trackerlistwidget.cpp

@@ -445,7 +445,7 @@ void TrackerListWidget::copyTrackerUrl()
     for (const QTreeWidgetItem *item : selectedTrackerItems)
     {
         QString trackerURL = item->data(COL_URL, Qt::DisplayRole).toString();
-        qDebug() << "Copy: " + trackerURL;
+        qDebug() << "Copy:" << qUtf8Printable(trackerURL);
         urlsToCopy << trackerURL;
     }
     QApplication::clipboard()->setText(urlsToCopy.join(u'\n'));

src/webui/api/synccontroller.cpp

@@ -215,8 +215,8 @@ namespace
                 break;
             default:
                 Q_ASSERT_X(false, "processMap"
-                           , QString("Unexpected type: %1")
-                           .arg(QMetaType::typeName(static_cast<QMetaType::Type>(value.type())))
+                           , u"Unexpected type: %1"_qs
+                           .arg(QString::fromLatin1(QMetaType::typeName(static_cast<QMetaType::Type>(value.type()))))
                            .toUtf8().constData());
             }
         }