Add an optional additional level where you can see your raw writing, without any snapping

Disclaimer: I realize that this is similar to issues #450 and #431

But these are years old, and there is some additional things I want to say.

Sometimes when I forget a kanji, I simply tap and drag where I think the nearest stroke starts, and then the snap then reminds me of how to write the kanji in full.

Problem is, this isn't really considered "mastery" of the kanji, since I had to be reminded how to write it via "cheating" using the stroke snapping.

Hence, I think this should be an additional optional final level where this happens, ensuring the user has full memorization of the character.