Cursorless tutorial follow-up work

[pokey]

• Look into removing highlight when the tutorial prereqs no longer met
• Make it so that closing the tab doesn't result in a save dialog
• Point out early in tutorial that you can play around and easily resume the tutorial
• Change title of tutorial tab to something other than 'Untitled-7'
• Show pop-up on install prompting them to do the tutorial. Prob should show pop-up even not on first install?
• Add other buttons like next/prev/list
• tutorial: Make hat forcing more robust #2563
• Add note at beginning of docs