v1.4.6 stable (Marlin 1.1.9)

• Fix stuttering / improve quality on models with high numbers of segments:
  • Save memory and CPU cycles by optimizing TFT code for state handling (pause, runout, ...)
  • Remove obsolete filament runout code
  • Increase jerk/accel
  • Increase ASCII buffer size
  • Decrease TX buffer size
  • Revert minimum segment time to factory default
• PID tuning:
  • Increase cycles on autotune via display
  • Add beep on completion
  • Revert latest changes on frequency (needs more investigation)

M502 and M500 (or Load FW Defaults and Save EEPROM via display) is mandatory after this update.