Core: Show keyboard sequence for navigation widgets

Fixes: QTCREATORBUG-26293
Change-Id: Ifc1df96b063365ee5b27684cb4efb33be2608582
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

src/plugins/coreplugin/navigationwidget.h

@@ -82,6 +82,7 @@ public:
     enum FactoryModelRoles {
         FactoryObjectRole = Qt::UserRole,
         FactoryIdRole,
+        FactoryActionIdRole,
         FactoryPriorityRole
     };