[Request]: Macro/Dashboard Button for 'Service Mode'

[V4nish]

What would you like implemented?

It would be great if, following the failure of a print (or not), a button could be clicked in Octoprint dashboard that would change segment(s) to a pleasant and plain, white/yellow-white type of illumination.

For example: on print failure, I've setup to strobe red and blue, which continues if I just need to quickly clean something/reset etc... but a more plain light during 'servicing' would be calmer.

[EDIT: If you point me in the file(s) where this may be implemented, then I can take a look...]