- Addressing issue #1741

- Make the default LCD click sound more pleasant
- Fix warnings about bed temperature runaway

Documented some additional areas that should be addressed if Z_PROBE is
fully separated from Z_MIN or Z_MAX.
Fixed a documentation error in sanity checks. Servos start at 0 not 1.

Bring all configs up to date

Apply Z_RAISE_BEFORE_HOMING before homing XY

Fix up LCD_PROGRESS_BAR

Conflicts:
	Marlin/Configuration.h

This rolls back to commit 06f767d608.

Restore ENDSTOPPULLUPS in Configuration.h

Allow POWER_SUPPLY to be 0

Conflicts:
	Marlin/Marlin_main.cpp
	Marlin/stepper.cpp

- Some messages should not expire with `PROGRESS_MSG_EXPIRE`.
- Simplify conditional for progress bar with sanity checks.
- Rename `messageTick` to `expireStatusMillis` and make it the expire
time.

Apply leveling for DELTA

Replace extrudemultiply by extruder_multiply[active_extruder]

Thanks @MagoKimbra.

Fix for #1460.

Seems to work with only one extruder. Can't test this myself with more.

Get back folder symbols on Hitachi displays

A `z_before` value is passed to probe_pt, but the `retract_z_probe`
function assumes that Z is 0, doesn’t add `current_position[Z_AXIS]` as
other cases do. This may be superfluous, so this is a test, and will be
reverted if it has no effect.

Remove some further warnings

- Fix `prepare_move` function not calling `adjust_delta`
- Add more shorthand for plan_buffer_line.
- Fix wrong `federate` usage, assuming they are all mm/m
- Minor `stepper.cpp` cleanup

Fix G29 E and M48 n

- Users prefer `G29 E` to work like `M48 E` so fixed that
- `M48 n` replaced with `M48 P` (or `p`). `n` legacy support
- Shorten some strings to save precious bytes
- Smaller code for 3-point probing

Fix G28 homing Y with X

Viki 2 Pins from Manual and Azteeg X3 Pro Endstop Reswap

- Fixed a typo causing G28 to home incorrectly
- Added documentation to G28
- Added homeXYZ bools to neaten the code
- Added a note about home_offsets being questionable

cardreader.cpp needs temperature.h for autotempShutdown() when
AUTOTEMP is defined but warns about unused variables.
Unpublished variables by putting them in to temperature.cpp.

and satisfy the compiler about the implicit compare.

therefor in macro ST7920_WRITE_BYTE(a) cast a to uint8_t
to make the compiler happy.

and make use of column 20.

unless Z_SAFE_HOMING is.