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.

・Solve a flickering when SD card is inserted or removed at using a ASCII
LCD + language_kana.h

・Add new translation

Update Japanese translation (work in progress)

Fix position shift with MBL

Follow-up the PR #4163 (Mixing and Switching Extruders)

Use blocking_move, current_position in G28 homing

・Update forgotten K8400 files

Wrangle feed rate variables

Debug char, fix compile errors for lcd pins