feat: Spell checker should expand search if no words are found

[elijah-potter]

When the spell checker encounters especially long, incorrectly spelled words, it fails to provide any suggestions.

For example: algorithmically gives no suggestions. Algorithmically is now in the dictionary, but when it wasn't it was marked as incorrectly spelled.

This can be fixed by gradually expanding beyond the max_edit_dist until a word is found.

[elijah-potter]

I've decided this is not a bug. If the quality of the suggestions would be reduced by this, I don't think we should do it.