Speed set in [Probe] is ignored

[goeland86]

As reported by klw on Slack:
https://replicape.slack.com/archives/C1NS74BKJ/p1550914753024900

It seems as though the speed setting in the [Probe] section is no longer used.
Can we revisit whether that value is still needed and it's not working because of a bug, or if it's irrelevant since we set the speed with G30 P0 F<speed> instead?

I'm not saying a strong development is needed, but clarifying and removing duplication of function is a definite advantage.

[BrunoSonego]

in my tests i saw that speed is working for Z axis on probing but not on X and Y when moving to position to probe. it may be setting to the wrong move inside the G30. as Z speed should be home speed and the set one the X and Y speed.