Make string translatable

Author: m-kuhn

python/plugins/processing/algs/qgis/ui/FieldsMappingPanel.py

@@ -324,7 +324,7 @@ def setLayer(self, layer):
             self.on_resetButton_clicked()
             return
         dlg = QMessageBox(self)
-        dlg.setText("Do you want to reset the field mapping?")
+        dlg.setText(self.tr("Do you want to reset the field mapping?"))
         dlg.setStandardButtons(
             QMessageBox.StandardButtons(QMessageBox.Yes |
                                         QMessageBox.No))