Additional foolproofing for tutorials.

[Eric B Jones]

• Players can click “Advanced” designer buttons when Assisted is glowing. Don’t let them.
• If players try to close vehicle designer window, or exit RnD without a vehicle made, stop them if they’re at that part of the tutorial. Reset the tutorial to the design vehicle stage.
• Finished button in Predesigned Body Selection does not glow.
• Make premade list glow.
• Don’t let premade select button work if nothing is selected.
• Disable letting players use Custom body design or Modify predesigned. We’ll move the audio files to a new tutorial…
• If the player designs an unusable component combination, reset the tutorial.
• Door, Clock, and Globe highlight blink.
• Select-Chassis, make sure the highlights don’t cover.
• Stop player if they do not set production or vehicle price.
• Turn off audio playback on exit() functions (should already exist, but seems to still do it in a couple states).
• Make lists not-unselect-able. If possible, extend to all lists everywhere.
• Have first premade vehicle automagically selected if no vehicle is selected.
• Closing windows with current tutorial active still allows overlays to flash, we need to reset the tutorial back when this happens.

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