Allow searching with 1 or 2 characters when JavaScript disabled

Describe the problem and steps to reproduce it:

• Open https://addons.mozilla.org/en-US/firefox/
• Type 2 characters in search box and try to act a searching

What happened?

• Searching is blocked by front-end, a tool-tip is shown, which ask user to input at least 3 characters.
• Manually changing URL to perform a 2 characters search works fine. So this is not a limitation by backend server. (example: https://addons.mozilla.org/en-US/firefox/search/?q=百度 )
• Update: browser built-in about:addons page allow searching with only 1 character.

What did you expect to happen?

It should allow user to perform a 2 characters search.

Anything else we should know?

It seems this change is involved by #4532, and @tofumatt asked to config this value as 3 instead of 2. Most Chinese words are two characters (about 70% ~ 85%), and many Chinese web sites use two characters name. It would be common and reasonable to perform a searching with 2 characters for Chinese language user. (I’m not sure about other languages, but maybe it also applied to some other East-Asian language.) So I would prefer this value to be 2. Or maybe no limitation if it won’t break searching backend. Auto completion would be another thing which I don’t care whether it require at least 3 or 5 letters.

[tiansh]

I think there should be a validation in js too.

So, maybe 2 should be fine.

[ioanarusiczki]

@willdurand Search suggestions begin when 2 chars are typed in instead of 3 (as it used to be). I filed a minor followup issue for the tooltip - https://github.com/mozilla/addons-frontend/issues/7604

dev versus prod