Fix EXTRUDER_OFFSET compiler error

Correct the comment about M206

Fix LCD click

- Addressing issue #1741

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

Bring all configs up to date

Apply Z_RAISE_BEFORE_HOMING before homing XY

Fix up LCD_PROGRESS_BAR

Restore ENDSTOPPULLUPS in Configuration.h

Allow POWER_SUPPLY to be 0

- 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