Use the watch to show tutorial progress and ability to skip

[tobylane]

I believe this would fix #1828

Describe what the proposed change does

• Add tutorial as a watch type, which is pushed forward with tutorial progress
• Prevent epidemics happening during other watch events (to match emergencies)

todo: The tutorial watch looks identical to the following initial opening watch, it could be blue?. The watch progress doesn't yet take into account any tutorial steps the user skips, such as looking through available staff or invalid room/staff placement. The watch doesn't fill in segment by segment, how is that done?

[lewri]

I wonder if we can superimpose tutorial on the watch at all... Or add an adviser message to point it out.

[tobylane]

Added a tutorial start message (button is meant to be bubble).

If any steps were missed in a chapter the progress is pushed up to date. This does draw another watch near the end of the tutorial, I have no idea why. It's the step when you place a doctor, 4, 4?

[lewri]

1,3 we start using a clock -- which I like -- but not sure why we go from all white background to all red.