Fix minor gcc warning

Fix, cleanup DELTA G28 / G29 support functions

DELTA do_blocking_move_to() more like the Chartesian one

Adjustments to planner acceleration limit

inline to fix warnings, smaller build size (sometimes)

Revert to position-difference method in run_z_probe()

Always switch to tool 0 for G28

Unify run_z_probe

Unify run_z_probe
Add double touch for DELTAs.
Introduce Z_PROBE_SPEED_FAST and Z_PROBE_SPEED_SLOW
  defaulting to homing_feedrate_mm_m[Z_AXIS] and homing_feedrate_mm_m[Z_AXIS]/2

Use ENABLED(MAPPER_NON)

Set homing feedrates individually

Fix some Reprapworld Keypad issues

Rename ultralcd implementation files for consistency

NOZZLE_CLEAN_FEATURE with no dependency on HAS_BED_PROBE

Update Japanese translation

Removes some minor GCC warnings

Adds utility.h

Updates u8glib's bmp2hex converter

General cleanup: enum

Introduce line_to_axis_pos() for use in homeaxis()

Follow-up the PR #4335 (Debug char, fix compile errors for lcd pins)

and use it in `homeaxis()` instead of `do_blocking_move_to_axis_pos()`.
`do_blocking_move_to_axis_pos` was wrong because it performed subdivided, delta-corrected moves for x- and y-axis.

The first common move for delta homing is like quick_home but for 3 towers.

Fix two warnings.