* Misc. Clean Up
Mostly UBL related clean up.
- But fixed a bug in the thermistortables.
- Made G26 more responsive to user aborts.
- Added sanity checks for older name for UBL_MESH_VALIDATION.
- Made G29 P4 able to edit invalidated mesh points
- Restore a reasonable Fade Height for UBL when creating new state information
- Get UBL's Topology Map to look a little bit better
- Make sure the user doesn't see a blank screen when doing Mesh Editing.
* Huh??? GitHub Desktop screwed up!
* get the planner object in scope
* Fix out of scope z_fade_height
* Travis timed out...
I need a change so I can force a new commit and sync.
- can be augmented in the future to enable for other leveling systems
Quite simple, but did not want to modify `G1` as the additional checking would slow it down.
Tested & working.
- fix broken `M421` due to less-than-careful optimization
- add HOME_AFTER_DEACTIVATE define to advanced config so not everyone has to rehome after steppers are deactivated
- misc. cleanups (remove unused label, unused variables)
- Add crc16 utility function
- Implement CRC16 for config store, remove old checksum, increment layout version
- Move UBL mesh store/load to MarlinSettings; increment UBL_VERSION
- Begin to lay out MAT structure, prototype functions, etc.
- Rename ubl.state.eeprom_storage_slot to .storage_slot
- Misc. optimization
- Cleanup/standardize/improve some messages
This is a work in progress!