Filter Wheel Moving Status, Error, Error Clear, Reset

[ZLLentz]

It would be nice at the EPICS level to see:

• If the wheel is moving
• If the wheel is in an error state
• What the error is

And to control:

• Clear errors/reset function block

[ZLLentz]

IM2L0's filter wheel is disconnected, these PVs could have been useful today