Attempting to create a Custom Application (similar to the built-in 'any' application) that only references RFC1918 IP space and does not reference port/protocols technically fails without user feedback. 

I've defined 'RFC1918_SERVICE' which only lists RFC1918 space and 'Any' protocol. However, when looking at the configuration output the application still has ports and protocols defined that do not show in the mist gui application definition. This is not the case for the built-in application 'any'.

Cannot create another custom app that duplicates the any application

Per development, this is working as designed to prevent collisions in the FIB table.