Move cursor to mistake/error

[remva]

Whenever an error occurs in someones code, the cursor could jump to the error. This will only/mainly work when there's only one mistake in the code.

With this, it will immediately become clear where the mistake is.

[bjorn3]

Depends on https://github.com/Felienne/hedy/issues/845

[Felienne]

I was thinking about this issue in connection to the very cool modals we have now and I was thinking... could we first show the wrong code in the modal (aka the code that the kids submitted) and then have it "morph" into the right code?

With a string differ that should not be all too hard (and with a string differ it also does not necessarily depend on #845)

[github-actions[bot]]

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[Felienne]

Think we can safely close this!