Removed `gantry_height` because it covers the entire build plate and
makes printing one at a time practically impossible. The user should
manually verify that the printing order is correct, so the external part
cooler does not nock of already printed models.
Pros:
- Less redundancy between elegoo_base and N4 definition
Cons:
- Changes in elegoo_base also effect N4
- I don't fully understand what presets get priority over others and
when they overwrite or just extend another preset. It works for now
but changes in Curas preset parsing/handling may break this
profile!
