3.7.2 Final

This update has some minor updates to the LA 1.5 implementation by @wavexx, and includes the final code for Prusa 3.7.2.

---

Prusa has merged M350 support, so I removed a bunch of variants that were made specifically for microstepping options.

Now you can set this yourself. http://marlinfw.org/docs/gcode/M350.html

M350 E16 ; Sets Micrstepping resolution for Extruder to 1/16
M500 ; Save to EEPROM

M503 ; This will report your current settings

Don't forget to adjust your esteps appropriately too.

M92 E415; Set for 415 E Steps (BMG 1.8 degree stepper with 1/16 microstepping)