Further cleanup of UBL

Implement USE_CONTROLLER_FAN as a feature

Keep refreshing LCD if hotend status is on-screen

Fix BLTOUCH_HEATERS_OFF bug

UBL: G26 minor improvements

General cleanup of G33

Fix Dual-Z endstop conditional test

- update comment section
- redefined P5 grid
- minor clean to probe radius routine
- updated EEPROM version to V37 according remark in #6517

Fix, cleanup, prettify `G29 O` output

Various leveling-related patches

* Fix Horizontal and Vertical optimization bug.

And drastically reduce the debug code foot print....

* Yeah Baby!

The debug print is going A - OK !

Fixes for DUAL_NOZZLE_DUPLICATION_MODE

Revert "Fix for Meshpositions if printer has negative endstop positions"

Patch DELTA_HEIGHT, BLTOUCH init

Various fixes for compiler warnings

- Only call `set_heaters_for_bltouch` when actually deploying/stowing
- Clear `next_emi_protection` when re-enabling heaters

add BLTouch-related messages in english and (rusty) french;
add missing endstops.h in ultralcd.cpp;
fix misc. compiler warnings;
fix lsf_reset - ZERO macro can't handle a pointer as it would only memset the size of the pointer, not the size of the entire struct

Some minor cleanups to code formatting