logic for traditional/simplified lookup needs tweaking

[balmas]

Since many or most characters are both, I'm not sure how you can use the presence of ANY selected character in the traditional index as indicating that the rest are traditional.

Hmm. This is a good point. I think the logic needs a little tweaking here. It works if nothing is found in the traditional index, because it will fall back to simplified, but if the first character is both traditional and simplified, we could be missing things in the forward context.

Originally posted by @balmas in https://github.com/alpheios-project/components/issues/892#issuecomment-579386830

[balmas]

the comment from @abrasax made me realize we need to fix our logic here.

If the first character in a lookup is both traditional and simplified, then we cannot make an assumption about what the subsequent characters are.

[balmas]

@kirlat let me know if the request isn't clear.