Change max length of names to 64 graphemes

[haileyok]

Why

Something that got surfaced by starter packs is that lists currently allow only 64 utf-8 bytes, not 64 graphemes. This is extremely restrictive, especially for foreign languages which use non-roman alphabets. For example, just adding the word hello to a list name (i.e. こんにちは) takes up 15 bytes.

I think bumping this to what I suspect is the intended max limit should be okay, since any previously created list should already be compliant with this. One thing to note of course would be that existing clients would maybe have problems when receiving a response that includes a starter pack with a longer name. At least for us, we could OTA something to the past few versions to help ease that concern.

[bnewbold]

Feels good and comfy to me. I would guess these values were mostly copypasta between Lexicons and should have been 64 graphemes from the start.

In terms of roll-out, I think doing everything but PDS for a week, then rolling out to PDS, is what would go easiest. Not sure how hard that would be to coordinate.