- Clean up the API to use a `static` class instance to adhere to Marlin convention
- Add `const` position data access for read/write
- Add Storage capacity to the interface

…when used with an I2C screen.

Co-Authored-By: soimy <soimy@163.com>

Counterpart to #11467

Co-Authored-By: lsellens <lsellens@users.noreply.github.com>

Address #11463

* Add Multi Unit Support for Max7219 to bugfix_2.0.0

* Apply multi-MAX7219 to example configs

* Tweak some spacing, macros

Fix #11279, #11252

Prevent crash, on filament change, when printer is not homed

See https://github.com/MarlinFirmware/Marlin/issues/5597#issuecomment-397683325

Fix #8890

Co-Authored-By: zarthcode <anthony.clay@zarthcode.com>

Better encapsulation and considerably reduce stepper jitter

Disabling an ISR on ARM has 3 instructions of latency. A Memory barrier is REQUIRED to ensure proper and predictable disabling. Memory barriers are expensive, so avoid disabling if already disabled (See https://mcuoneclipse.com/2015/10/16/nvic-disabling-interrupts-on-arm-cortex-m-and-the-need-for-a-memory-barrier-instruction/)

Fix #10708

Use macros that explicitly avoid double-evaluation and can be used for any datatype, replacing `min`, `max`, `abs`, `fabs`, `labs`, and `FABS`.

Co-Authored-By: ejtagle <ejtagle@hotmail.com>

Co-Authored-By: ejtagle <ejtagle@hotmail.com>

Co-Authored-By: ejtagle <ejtagle@hotmail.com>