Combine axis home buttons for certain kinematics

[chrishamm]

Many kinematics require a set of axes to be homed at once. Combine the home axis buttons in the move panel if necessary and call the corresponding macro (or G28 <subset> if changed in RRF) using the combined home button.

[T3P3]

This is unnecessary complexity, for example SCARA normally homes in a set sequence of axis, but during testing you may only want to use part of that sequence. Use home all