Include Plotly.js localization

[yoshiokatsuneo]

What type of PR is this?

• Feature

Description

For now, the locale for the chat is English. It is not very intuitive for non-english people to show chart in English (ex: "January").

Make localized charts available by including and registering plotly.js localization definitions, and set locale based on browser language.

How is this tested?

• Manually

I confirmed that the "Month" and pop-up information is localized.

[eradman]

Is there a method of including all locales? It's hard to tell if we missed one

[yoshiokatsuneo]

@eradman

Is there a method of including all locales? It's hard to tell if we missed one

I don't think so.
Unfortunately, I think plotlyjs does not provide the way to register all locale at once, and webpack does not provide simple way to import all the locale files.

[eradman]

If I'm reading this right, this will add about 88KB to the size of the web app:

before

after

Out of 6.5MB this is an increase of 1.3%, which is probably fine.