[rules-dev] FAO: Jervis Liu: Disabling editors configuration

Sorry to bother. Needed to add a configuration point to enable/disable external editors (for the Form Builder inclusion in Guvnor. Might also be useful for the Process Designer). This should be a configuration on server side, non dependent on gwt compilation. I would like to see your input on where would be the best place to keep such a configuration, if none is planned already. Thanks in advance, Mariano