Mode for auto-locking completed + correct words while not revealing incorrect squares

[hugleo]

I suggest to improve auto check like: check the whole word instead of showing the wrong letters, never mark a letter with a backslash and just lock the word when is correct. This way it will be hard to guess the word by attempts letters in alphabetical order and will be more fun to play.

[mdirolf]

Thanks for the suggestion! I can see how this would be a different experience at the beginning of a solve when the grid is wide open. Towards the end of a solve this would converge with the current behavior since you would have most squares locked via crossing entries.

I don't think this is a super high priority issue for me to address but if somebody else wants to take a crack at it I'm happy to merge a new autocheck mode/option.