General fixes to the lcd_edit_off item and improved way to generate the toggles.
The old process is this: Write '>' if required -> print base -> pad everything before the last character with spaces -> write the eol character -> jump back and print the toggle over the blank characters. This resulted in noticeable flickering when the toggle was redrawn and was showing the same thing. Now the process is similar, except that everything happens in a "line buffer" (a char buffer that holds an entire line) and gets printed in one go, avoiding jump instructions for the lcd and prevents flickering since it doesn't write ' ' and the letters afterwards.
This should get even better when the lcd_buffer gets implemented since the line_buffer will get compared to the existing data on the screen and avoid overwriting what is on the lcd with the same thing.
All toggles from "HW Setup" were changed.
This includes:
-"Nozzle d."
-all "Checks"
Also added an option to provide a string from sram (not from progmem) as the toggle argument. This can be useful when toggling numbers or even when toggling sheets in the future.
As sdpos_atomic was not updated after printer power up and first power panic recovery, it was equal 0. When the first command from SD card was queued its size on SD card was computed as current SD index position minus sdpos_atomic. This was equal to offset from beginning of the file limited to 16 bit storage type. When next power outage occurred earlier then this command was finished and wiped out of queue, this command size (extraordinarily big) was subtracted from sdpos_atomic and saved to EEPROM. This led to up to 65536 B jump back in file printed after next power panic recovery.
Remove variable CrashDetectMenu. Read this state from EEPROM_CRASH_DET instead in bool lcd_crash_detect_enabled().
Rename crashdet_enable() to lcd_crash_detect_enable() and move it to ultralcd.cpp.
Rename crashdet_disable() to lcd_crash_detect_disable() and move it to ultralcd.cpp.
Rename lcd_crash_mode_set() to crash_mode_switch().
Remove forward function declarations from *.cpp file.
Saves 34B of FLASH and 2B of RAM.
