Wizards: Sort

Introduce new QString id() const-API and sort wizards by
[untranslated] category and id. Introduce respective constants.
Rubber-stamped-by: con <qtc-committer@nokia.com>

src/plugins/qt4projectmanager/customwidgetwizard/customwidgetwizard.cpp

@@ -39,9 +39,10 @@ namespace Qt4ProjectManager {
 namespace Internal {
 
 CustomWidgetWizard::CustomWidgetWizard() :
-    QtWizard(tr("Qt4 Designer Custom Widget"),
+    QtWizard(QLatin1String("P.Qt4CustomWidget"),
+             tr("Qt4 Designer Custom Widget"),
              tr("Creates a Qt4 Designer Custom Widget or a Custom Widget Collection."),
-             QIcon(":/wizards/images/gui.png"))
+             QIcon(QLatin1String(":/wizards/images/gui.png")))
 {
 }