tutorial: sleep if not doing anything

[wxtim]

Problem

Tutorial tasks run too fast to see in TUI and GUI, especially for the scheduling tutorials.

Proposed Solution

Add sleeps to tutorials to slow the running of early examples down.

Alternative proposed solution

Wait for task-by-task run mode setting provided as part of the skip mode work and use simulation mode instead. In my opinion this is better for learners because [TASK]run mode = simulation makes it very explicit that the task isn't running anything real.

[oliver-sanders]

Putting a simple 2-4s sleep in for now so we can get this deployed before the next training session.

@wxtim, feel free to re-open if you had something fancier in mind.

[wxtim]

Putting a simple 2-4s sleep in for now so we can get this deployed before the next training session.

@wxtim, feel free to re-open if you had something fancier in mind.

I am fine with this.