When I make a JSF2.0 project in eclipse, the opening of it's faces-config.xml file always starts the faces configuration editor. But now I have a Google AppEngine project and I have added JSF2 (and PrimeFaces) manually. And when I open the faces-config.xml file, the faces configuration editor doesn't start so I can edit this file only through xml source.
How can I activate the Faces Configuration Editor for this project?