Merge pull request #2021 from kuhnmarek/bugfix/PFW-917_saving_live_z

PFW-917 Adjust Z value persists across update to v3.8

Firmware/eeprom.cpp

@@ -71,6 +71,12 @@ void eeprom_init()
         }
         if(is_uninitialized)
         {
+            // When upgrading from version older version (before multiple sheets were implemented in v3.8.0)
+	    // Sheet 1 uses the previous Live adjust Z (@EEPROM_BABYSTEP_Z)
+            if(i == 0){
+                int last_babystep = eeprom_read_word((uint16_t *)EEPROM_BABYSTEP_Z);
+                eeprom_write_word(reinterpret_cast<uint16_t *>(&(EEPROM_Sheets_base->s[i].z_offset)), last_babystep);
+            }
             eeprom_write(&(EEPROM_Sheets_base->s[i].name[0]), static_cast<char>(i + '1'));
             eeprom_write(&(EEPROM_Sheets_base->s[i].name[1]), '\0');
         }