* Fix bug with `undo startSketchOn` removing existing sketch
Fixes#6822, I believe. in this case the `variableName` was not being
marked as in-use, so I just logged out the AST and made sure this case
was covered. @Irev-Dev this is probably worth a check from you.
* Add a regression test
It's an E2E test because I'm being lazy, but it should probably be an
XState unit test at some point.
* check what's checked
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Co-authored-by: Kurt Hutten <k.hutten@protonmail.ch>
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