[FR] SENSORLESS HOMING - Only set CURRENT_HOME to actively homed/probed axis

[sargonphin]

Is your feature request related to a problem? Please describe.

Hello,

I have noticed that the stepper CURRENT_HOME is applied every time any form of homing and probing is running when sensorless homing is enabled and working. I have perfected sensorless homing to the best settings but I run into speed problems for X and Y during "travel" moves.

I have noticed for example that, after homing XY, the steppers still retain their CURRENT_HOME settings, which is faaaaar lower than running current. They also retain their spreadCycle mode instead of stealthChop which makes then less reliable at low currents.

Are you looking for hardware support?

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Describe the feature you want

When an axis is not being actively probed, set currents & stealthChop configuration to their running configuration to allow for faster speeds when homing/probing

Additional context

This feature right now mainly applies for sensorless homing because it uses extremely small currents compared to regular moves. A printer with endstop switches wouldn't benefit much from such feature because it uses homing currents closer to running currents, if different at all

[Mjankor]

Also related: #26369

[github-actions]

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