Change the default-default state name from "Invalid" to something else for the state setup helper

[ZLLentz]

Current Behavior

Debug can be confusing since the default state name resets to "Invalid" after each call, so the sName looks like it's being called with value "Invalid" in online mode, causing some confusion and generating red herrings

Expected Behavior

Debug should be less confusing
The default default is essentially irrelevant here, functionally: you only call this FB if you want to set up a real state with some name.

Context / environment

Encountered while helping debug on tmo motion

Steps to Reproduce (for bugs)

1. look at tmo-motion sp1k4 program in online mode

Suggested Solution

Change it to empty string, "unnamed", or something else less scary.