Fix Clean Nozzle function for Davinci 1.0

Fix :Add missing End-Stop values (X and Y) on clean nozzle function,
without them, nozzle is not in right  position to be cleaned on Da Vinci
1.0,
Fix: Decrease movement from 30 mm to 20mm to avoid to hit some metal
plate on back on 1.0, in configuration.h
Fix: Typo issue in menu for 1.0