Once the i18n system is set up in our app, we need to move the existing strings that are supposed to be translated into the en.json file and create corresponding descriptions in the qqq.json file.

• All current QB copy that is supposed to appear in the final version is moved into the en.json file
• There exists a description for each of those items of copy in the qqq,json file
• Tests are adjusted to handle the message key instead of the message: https://github.com/wmde/query-builder/pull/58#discussion_r524421970