Switch to G27 in abort print option

[formless63]

This prevents the printer from it's current abort behavior that can drag the hot nozzle on the bed and dig in and/or catch the print on it's way to the current G28XY command, especially because bed mesh is no longer respected once performing the cancellation. This does introduce a problem of the screen freezing on the "Stop Printing?" screen, however this is far preferable to physical damage to the printer and can be solved with a power cycle. Heaters do shut off during this process as expected regardless of the screen state.

Requirements

• Filling out this template is required. Pull Requests without a clear description may be closed at the maintainers' discretion.

Description

This prevents the printer from it's current abort behavior that can drag the hot nozzle on the bed and dig in and/or catch the print on it's way to the current G28XY command, especially because bed mesh is no longer respected once performing the cancellation. This does introduce a problem of the screen freezing on the "Stop Printing?" screen, however this is far preferable to physical damage to the printer and can be solved with a power cycle. Heaters do shut off during this process as expected regardless of the screen state.

Benefits

Prevents physical damage to printer when using on-screen End Print functionality.

Configurations

This is an edit to Configuration_adv.h itself. Used with existing NOZZLE_PARK_FEATURE settings already in Configuration.h

Related Issues

Closes #12

[Sebazzz]

NOZZLE_PARK_FEATURE is defined so this should be fine. @nickacker any concerns from your side?