Fix menu redraw for DOGLCD, improve MBL

Reduce PROGMEM usage by TWIBus, stopwatch

Fix G92 setting E twice

Z Safe Homing for all

The `Z_SAFE_HOMING` feature is coupled with probes and not leveling, so
make it available for general use.

General code cleanup, improved naming, etc.

Allow setting PIDTEMP and PIDTEMPBED together or apart

Show steps done in the babystep display

Git helper shell scripts for MarlinFirmware

Aesthetic, functional improvements for Graphical Display

Output error message for M303 if PIDTEMP is disabled

Update and change Japanese translation