Update lexxy to latest

[jorgemanrubia]

Update Lexxy to bring color highlghting and many other improvements.

Among many bugfixes, this will bring TAB for nav list items, and fixes a bug where page refreshes in the card perma would break promtpts.

More in https://github.com/basecamp/lexxy/releases

Pending:

• [x] Review nested list items
• [x] Review attachment input CSS

[jorgemanrubia]

@andyra could you please review these two:

• Lexxy now supports nested list items (with TAB). But are are rendering two bullet points for those in Lexxy:

• Review the CSS for the attachment caption input. It is now a textarea and Lexxy does not inject the .input class anymore. I copied over some styles from our .input class, but good to review.

CC @zoltanhosszu in case he has feedback here.

[zoltanhosszu]

@andyra for the nested lists, you can simply apply style .lexxy-nested-listitem for as per https://github.com/basecamp/lexxy/pull/462 to remove the list-style :)

[andyra]

Alright, styles are in place for color highlighting. I also got nested lists in working order and made a couple other minor adjustments to get everything looking sharp.