Update to work with Blender 3.5

[iingram]

Been using with old versions of Blender and am thus not taking advantage of some improvements/fixes. Just tried running on Blender 3.5 and after some futzing the operator is at least runnable. However, on playback only sends data to robot for a brief moment and then stops. And on scrubbing does not send data to robot at all. Interestingly, adjusting an f-curve or moving an axis directly does update.

[iingram]

Also: currently only able to get operator properly accessible in 3.5 by running the script directly in Blender text editor i.e. when install add-on can't see operator in Operator Search.