Too small save/load steps
The save/load steps are currently to short. A window that was open when the user saved, will not be open anymore etc.
So the code needs to be restructed so that the steps become longer. Eg.
Step 0: Intro
Step 1: Build station 1
Step 2: Build station 2
Step 3: Build road
where each step will include several points where the Tutorial will wait for the user to complete a task. Thus, the current assumption that the unit "step" is used for both save/load and when the tutorial waits for the user has to be removed and the structure changed.