SAVE_GCODE_STATE should also save the M117 message, and of course RESTORE… should bring the original message back
If you have for example “Layer 123/456” on your LCD display during printing and execute for wathever reason a pause, you will probably see “Paused” on the LCD. (depends all on your macros)
After the resume, the original message “Layer…” will be displayed only after the next layer change.
Could be nice if the RESTORE_GCODE_STATE would bring back the original message.