No compromises for the manage_heater(). manage_heater() will return immediately when there is nothing to do, but needs a constant detaT to work proper.
Calling idle() only every 200ms results in a display update every ~2 seconds - that should be enough.
For the other functionalities in idle() and manage_inactivity() 200ms is a lot but hopefully works.

Speedup sreen update delay
and correct a comment.

A module division by 10 is slooooow. (powers of 2 are fast - but then you can AND a bitmask with the same result)

Automatically set X2 stepper pins

Implements S1 argument in M999

DUAL_X_CARRIAGE fixes, improvements, Travis test

Update Japanese trasration

・Add new translation
・Change translation

Function declarations in headers don't need "extern"

Bezier style and DELTA patch

Require homing of Z before G29

Minor DELTA segmentation speedup

Minor DELTA segmentation speedup by pulling calculations out of the loop.

Add BEZIER_CURVE_SUPPORT — G5 command

G29: Report final position back to host when using MBL

Separate Z_PROBE_ALLEN_KEY from MECHANICAL_PROBE

Bugfix: iteration invokes undefined behavior

Fix checkExtruderAutoFans

Remove the hotbed icon from the status screen

Make sure to only set the fan state once when extruders share a fan

Follow-up for #3720 and #3759

Fix MBL zigzag calls

Fix various issues with MBL command M421

Cleanup the buildroot

Update forgotten Configuration_DUAL.h

Remove need to define unused pins as -1 in pins files

Printcounter bugfix and some new features

Tweaks to some verbiage