User can en/disable the fan check during print. This is very useful in case of false positive
fan errors to let the user to decide to finish print with "faulty" fan.
It makes no sense keeping watchdogReset as a separate function which
must be called, since it only contains one instruction: "wdr".
Not only was the code larger by 32 bytes in total, but also much slower
(call+ret take 4 cycles together for no reason in this case).
Surprisingly, doing just this on FW 3.9.3 solves issue #2954 on the one
affected EINSY board, even though it makes not much sense (there must be
some other timing issue).
Another request from our Service dept. - the user shall be prevented
from skipping the intro wizard, because otherwise some preset/calibrated
features will look like not done - especially live-z calibration.
And since there are users, who send a machine to service to perform 1st
layer calibration only, they must not omit the Z-calibration at the
start after shipping.
As the `M0/M1` moved to the beginning of the parser
- parser would not be able to "find" `M1nn` command if the query was `M1` instead of `M1 `
- to be able to "stop/halt" without sending a string and display default message use gcode `M0`
- as there are no `M0nn` gcodes the parser can query `M0` without additional space needed as in `M1 `
- If `M73` `R,S,C,D` values set the LCD Info screen clock switchs between Remaining and Change time
- If Remaining time is 0 while Change time is >0 the clock switchs between Change time and actual printing time
- If Change is 0 while Remaining time is >0 the clock shows the Remaining time
- If both are 0 the clock shows the actual printing time
- `M73 C` values are shown in "Normal" mode
- `M73 D` values are shown in "Stealth" mode
- Changing the speed will try to calculate the espected times and show `?` behind `R` or `C`
