Redo of #2939 rebased against RCBugFix

Fix status LEDs update when reinitializing the display

Remove unused ALARM_PIN

Fix disable_all_heaters() for MAX6675

Remove unused ALARM_PIN from all the Configuration.h's

Enable USE_WATCHDOG by default

Code cleanup in gcode_T

Fix Z_RAISE_AFTER_PROBING for non DELTA printers

Temporary workaround for stack overflow

twice for a servo based probe.

raise_z_after_probing() was only called if the printer type was set to a
DELTA or if the printer had a docking sled for the probe.

Example configuration for Kossel XL

Fix "M145" output in M503 report

Fix board type for Hephestos: RAMPS 1.4

Fix GCode handling of spaces between command letter and first digit

Fix crashes when the Z axis is moved via LCD
by calling `plan_buffer_line` only when there is enough room in the
planner buffer, to avoid endless recursion.
A brief description about what went wrong is in #1166

K8200: sample config back in sync

Fix: current_command_args contains command

@thinkyhead
Hi Scott,
your code from a0f362c7@thinkyhead is great, but you forgot to skip the
command.
Symptom `M117 Test`shows `M117 Test` on LCD instead of `Test`.

see also
https://github.com/MarlinFirmware/Marlin/commit/a0f362c735401ebbcd95de3f
6f8e3c2f17ecc770 lines 941, 2851 and so on

Greetings and welcome back

Jochen

Remove obsolete STEPS_MM_E setting

* Configuration.h:
  * updated header comment
  * new UUID feature used
  * sync to default config
  * typos fixed
  * changes better documented
  * reflect change in SDSUPPORT feature
* Configuration_adv.h
  * updated header comment
  * thermal protection tuned to work with K8200
  * homing tuned
  * sync to default config
  * typos fixed
  * changes better documented
  * reflect change in LCD features
  * use long filenames
  * use Watchdog
  * use Babystepping
  * use Auto Filament Change

more suitable display format for delta printer

Repair N in ADVANCED_OK

Rc bug fix

Replace the "ok" in M280, M301, M304, M851 with output not including …

Drop the experimental Configurator

Sanity-check deprecated options replaced by SPI_SPEED

Use next open E connector for Y2/Z2

Remove references to marlinfirmware.org

- Include aligned comment about new SDSUPPORT behavior

Fix handling of spaces in GCode