Always include English code names in the auto-complete list

[tanius]

We recently got the collaborative coding feature #106, where the Open Ethnographer coding UI will propose all codes used in a coding project that the user selected, independent of who created that code.

So far, codes will only appear in one language:

Code names in the autocomplete list are in the user's preferred coding language. If a code name is not available in the user's coding language, in English. And if not available in English. the code's first name is used. (source)

That should change so that, in the future, both the code name in the user's coding language and in English should be included.

Reasoning: This is not a hierarchical lists to select from, where we would want to avoid any redundancy to keep the list in order. Instead, this is an auto-suggest list, and including redundant alternatives here helps and does not hurt. Users might simply first remember or try the English code name, for example because a translation was only added later and they did not yet see that.