* Correct list's "find" and "get" blocks help.
Both blocks were using the same help URL.
Two unrelated results of recompiling messages:
* Allow unwanted 'qqq' messages to be reverted.
* 'constants.json' is unchanged, but sorted.
Also improve python json dumping.
* chore(messages): npm run messages
This is the raw changes made by `npm run messages`, without any
manual reverts / backporting.
* fix(messages): Backport TranslateWiki hints (with edits)
Backport changes made to qqq.json by TranslateWiki editors to
messages.json, with some modifications.
See https://translatewiki.net/wiki/Template:Optional for details
of how the {{Optional}} template works.
* chore(messages): Apply backported messages.js changes to qqq.json
Also manually revert deletion of translation credits.
This will be used to define constants accessible in JSON block definitions. Messages with descriptions that include `{{Notranslate}}` will not be included in the translation files sent to TranslateWiki. Instead, they are written to `msg/json/constants.json`, and later merged back into the `.js` files, similar to synonyms.
Template details: https://translatewiki.net/wiki/Template:Notranslate
