Disable unused extruders (motors)
With diamond color mixing setup there is 3 extruders (extuder motors).
If I print with only one extruder (mostly first one) other should be disabled.
Right now (0.92.2) two unused extruders are also enabled and get heated even if print do not have job for them.
Probably, best solution is that Disable heater timeout should be counted for every exturder separatly not together.