* Auto-enable DISABLE_REDUCED_ACCURACY_WARNING if HOME_AFTER_DEACTIVATE enabled

If HOME_AFTER_DEACTIVATE, there is no need to warn on LCD since printer will home prior to starting print.  Saves 60 bytes PROGMEM.
add HD44780 too

* Reduce lines used

* Reduce lines used

As pointed out in #7692 by @totalitarian

Addressing #7745

Forgot to update examples configurations. Done now

Added new configuration to inhibit XYZ movements when home is not done

Expected behaviour: while (auto)extruding the new filament, the nozzle should not move. It should move (from filament replacement position to printing position) only after the user has confirmed the successful filament replacement and extrusion.

Actual behaviour: while (auto)extruding the new filament, the nozzle moves from filament replacement position back to printing position.
So the extrusion step is mixed with the movement required to go back to the printing position.

The provided code seems to be working but probably a better fix is required.

Based on #7792 by @tcm0116

Based on #7769

Fixed typo where ST7920_DELAY_2 was being #defined after a check for #ifndef ST7920_DELAY_3

Sanity Check for LCD_FOR_MELZI  would fail with "Please select no more than one LCD controller option" any time #define LCD_FOR_MELZI was enabled in Configuration.h, even if there were no other LCD options enabled.

Ideally, it should be calculated based on Z steps per unit so that each
babystep corresponds to around 0.025mm. Smaller than this is largely
insignificant for typical layer heights.

As pointed out by @marcio-ao in #7638

* matrix names update

* symplified names

* new angle normalization

* ABC

* axis

* least squares

* recalc_delta_settings

* endstop_adj

* 0p

* bug

Replaced extruder with hotend

According to LinuxCNC, G5 should throw an error if the current plane mode isn't XY.

* Add MAX7219_DEBUG to Travis CI testing

* Tweak config and use standard pin naming for MAX7219_DEBUG

* MAX7219: Apply coding standards, use macros, etc.

* Make code work...