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

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

src/Gui/ManualAlignment.cpp

@@ -996,7 +996,7 @@ void ManualAlignment::align()
         bool ok = computeAlignment(myAlignModel.activeGroup().getPoints(), myFixedGroup.getPoints());
         if (ok && myDocument) {
             // Align views
-            myDocument->openCommand("Align");
+            myDocument->openCommand(QT_TRANSLATE_NOOP("Command", "Align"));
             for (std::vector<App::DocumentObject*>::iterator it = pViews.begin(); it != pViews.end(); ++it)
                 alignObject(*it);
             myDocument->commitCommand();