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/git/clonewizard.cpp

@@ -31,6 +31,7 @@
 #include "clonewizardpage.h"
 
 #include <vcsbase/checkoutjobs.h>
+#include <vcsbase/vcsbaseconstants.h>
 #include <utils/qtcassert.h>
 
 #include <QtGui/QIcon>
@@ -41,6 +42,7 @@ namespace Internal {
 CloneWizard::CloneWizard(QObject *parent) :
         VCSBase::BaseCheckoutWizard(parent)
 {
+    setId(QLatin1String(VCSBase::Constants::VCS_ID_GIT));
 }
 
 QIcon CloneWizard::icon() const