PartDesign: Issue #0004473: Expose openCommand() to translation

Continuing the work to expose the undo/redo functionality to translation. This commit does so for the PartDesign Wb.  
Ticket: https://tracker.freecadweb.org/view.php?id=4473

src/Mod/PartDesign/Gui/TaskFilletParameters.cpp

@@ -235,7 +235,7 @@ void TaskFilletParameters::apply()
 {
     std::string name = getDressUpView()->getObject()->getNameInDocument();
 
-    //Gui::Command::openCommand("Fillet changed");
+    //Gui::Command::openCommand(QT_TRANSLATE_NOOP("Command", "Fillet changed"));
     ui->filletRadius->apply();
 }