WCF configuration editor not showing in VS2010 Workflow Service Project

I am creating a Workflow service project for WF 4.0 in VS2010.

When I right-click on my web.config, I am not seeing the “Edit WCF Configuration” option:

 

I realised that a work around for this issue is to launch the editor from the tools menu:

This seems to wake VS up, and once that has been done the option will show: