Speed limit does not work when using PolledUpdate

[MoeHero]

Describe the bug
Serial output, speed limit function does not work when using PolledUpdate mode

[Yoooi0]

When using PolledUpdate only script actions are sent, all other MFP features are ignored.
PolledUpdate was added only for devices that cant handle higher update rates, so they at least can play a script.

I added #180 as currently this is not a bug, its just not implemented.