### Version 4.1.5
* Added dot for SD write operation.
* Added statistics menu.
* Added an overall configuration file.
* Added M70 gcode for calibrate AC721 current sensor.
* Added documentation for calibrate AC721 current sensor.
* Critical stepper motor frequency bugfix.
* Introduced more intuitive menu tree.
* Added a menu option to fix loose steps from LCD.
* Improved italian translation.
* G28 gcode now support the “B” flag that enable you to come back to the last position of the axis before the homing command. (Used for fix loose steps)
* Implemented FAST_PWM_FAN and FAN_SOFT_PWM also for other fan that can be added in configuration_adv file.
* Added the ability to set a min speed to the fan that can be added in configuration_adv file.
* General bugfix.