Chamber Temperature Variable

[Maxwell-Wellan]

Hello, I recently was changing my start gcode for the printer to allow the chamber to heat up right on print start. This is allowing the printer to heat soak a little to produce a better print.

I noticed there is a variable "bed_temperature_initial_layer_single" used for the M190 command. Can we get a "chamber_temperature" variable so we can do the same with a M141 command. This way the chamber temperature would be dynamic and would heat up depending on the material being used.