Fix layout descr. in configuration_store.cpp

[thinkyhead]

• Update the layout description with current version ID.
• Move M666 Z to the correct place.
• Wrap a non-gcode output line in if (!forReplay).

[Blue-Marlin]

How about a ';' in front of the comments. Then they should be readable by humans and ignored as comments by the g-code interpreter. Would save all the if (!forReplay) stuff.

[thinkyhead]

@Blue-Marlin The headings would definitely benefit by getting a semicolon in front.

The forReplay flag may actually be more useful in the future. I've been proposing that the output from M503 might double as the data written to EEPROM. Then the function to restore settings from EEPROM need only run the GCode stored in EEPROM, with no more version numbers needed. So the forReplay flag was designed to produce the shortest possible output, in case it might need to be written to EEPROM.

That said, so far I haven't written the functions to write these strings to EEPROM, but it should be a pretty simple task. I'll look at it more closely when I get into wrapping up the EEPROM code into a class.