Tutorial exit tip

[dtinth]

Changelog

The TUTORIAL now displays a tooltip that teaches new players how to exit the game.

[codecov-io]

Codecov Report

Merging #542 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #542   +/-   ##
=======================================
  Coverage   81.31%   81.31%           
=======================================
  Files         156      156           
  Lines        4682     4682           
  Branches       77       77           
=======================================
  Hits         3807     3807           
  Misses        853      853           
  Partials       22       22

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