Clean up around tasks

[tinchodias]

We are not listening these signals, and they make the code more difficult to comprehend. I'd remove them similarly what we did with telemetry in #439

[tinchodias]

@plantec In my most recent commit, I simplified repeated task. I tried these uses:

• ToExperiments class>>#example_rotationAnimation
• ToSandBox class>>#example_toLabelWithTime
  And Album examples, for the blinking cursor.

The example with fork works now

[plantec]

cool, I like all the cleaning.
"The example with fork works now", do you mean without BlTaskAction use ?

[tinchodias]

cool, I like all the cleaning. "The example with fork works now", do you mean without BlTaskAction use ?

yes, without need of BlTaskAction. However, I think its better to use BlTaskAction.

[tinchodias]

This closes #449