Merge branch 'Development' of https://github.com/MarlinFirmware/Marlin into Bulgarian

Documentation/BedLeveling.md

Documentation/Compilation.md

Documentation/Contributing.md

Documentation/Features.md

Documentation/FilamentSensor.md

Documentation/GCodes.md

Documentation/LCD Menu Tree.pdf

Documentation/Menu Plans.xlsx

Documentation/MeshBedLeveling.md

Documentation/RampsServoPower.md

Documentation/changelog.md

Marlin/Conditionals.h

Marlin/Configuration.h

Marlin/Configuration_adv.h

Marlin/Makefile

Marlin/Marlin.h

Marlin/Marlin_main.cpp

Marlin/SanityCheck.h

Marlin/SdBaseFile.cpp

Marlin/boards.h