[2.0.x] Display up to 3 extruders on char LCD

…and show bed level indicator at the position of the [H] icon, when a heated bed exists.

[2.0.x] DUE - update for Reprap Discount Full Graphic Smart Controller

[2.0.x] Multi extruder support for M600 / LCD

[2.0.x] No sub-menu if NO_VOLUMETRICS

For parity with #8911

[2.0.x] Fixes for G29, esp. 3POINT

[2.0.x] //Actions on Pause / Resume (M600, M125, etc.)

* Use NOZZLE_PARK_FEATURE for ADVANCED_PAUSE_FEATURE

[2.0.x] Reduce default jerk. XY by half. Z by 1/4

[2.0.x] remove SET_OUTPUT glitch - LPC1768 & DUE

[2.0.x] SCARA Feedrate Scaling for G2/G3 - using HYPOT

[2.0.x] RADDS LCD Display

adds setup for the original Radds Display+Controller+SD Card Reader PCB
http://doku.radds.org/dokumentation/lcd-display/

USB Mass Storage Implementation / CDC with HW flow control and misc fixes and improvements for Arduino DUE/RE-ARM based boards

[2.0.x][PlatformIO] Stop compiling after first five errors

[2.0.x][Language] Update Czech for Dec 2017

[2.0.x] Revert "Followup to #8698"

This reverts commit 4e891e9fb7.

[2.0.x] Restore position_float to LIN_ADVANCE

Reverting commit 3cd7659