PD: Attempt to translate exceptions in dialogs

Relies on the exception text having been added to the translation database in a previous call to QT_TRANSLATE_NOOP, and put in the 'Exception' context.

src/Mod/PartDesign/Gui/TaskPolarPatternParameters.cpp

@@ -332,7 +332,7 @@ void TaskPolarPatternParameters::onAxisChanged(int /*num*/)
             pcPolarPattern->Axis.Paste(axesLinks.getCurrentLink());
         }
     } catch (Base::Exception &e) {
-        QMessageBox::warning(nullptr,tr("Error"),QString::fromLatin1(e.what()));
+        QMessageBox::warning(nullptr,tr("Error"),QApplication::translate("Exception", e.what()));
     }
 
     kickUpdateViewTimer();