* relocated ubl state to config. store:
* removed a number of ubl state variables and padding which were largely unused - saved 58 bytes of both SRAM and EEPROM;
* modified ubl sanity_check - no longer checks removed state variables that were otherwise unused, where checking didn't seem to accomplish anything, ultimately;
* removed pre_initialized state, saving 64 bytes of SRAM;
* removed automatic saving of UBL state after UBL activation/deactivation;
* consolidated multiple GRID_MAX_POINTS_X/Y to 'Global Leveling' section of EEPROM;
* minor update to G29 Sx notes/instructions;
* renamed mesh load and save parameter to 'slot' from 'm' for clarity;
This data corruption problem is very difficult. Just changing the code
a little bit changes whether the problem even happens and what is
affected. I need these changes in the main branch so I can operate with
the extra debug code always available and turned on.
Everything is setup such that if M100 is turned off or DEBUG(ECHO) is
turned off, the code is not affected. M100 has been made a little bit
more inteligent so it can display the serial command buffers in a more
meaningful way (because the data corruption seems to often times end up
in that area).
Configuration_store.cpp - changed a couple of print statements so the
values were printed. The old method resulted in the formula being
printed.
ubl_G29
1) added support for R option to P4. Now probes all points unless R is
present and the number is greater than 0.
2) P2 - moved map print statement so it showed the point that was
currently being probed, The old location did this only for the first
point.
3) P4 - Moved the map print for the same reason.
ultralcd.cpp - changed "Mesh Editor :" to "Mesh Editor" because the LCD
draw routine puts a ":" in automatically so you end up with an extra ":"
using the old message.
Pretty much... The code is in place. Still more work to do. But it
has a lot of hooks and variables in other code, so commit and merge
before I pick up a million 'Conflicts'.
