Added multiple new functions to the GRBL fork and the G-EDM UI.

One thing that is new is the ability to home XYZ through touch inputs:

And one of the most important features is the new possibility to retract the X and Y axis. This feature makes this build ready for horizontal probing and Wire EDM and is basically a ring buffer that stores the previous motions for a few mm and allows to move back and forth on the motion history.

The video just shows a quick test.

Let's get ready for Wire EDM!