FAQ: correct for idiomatic English grammar

[apotheon]

The FAQ contains many instances of grammar that is not idiomatic or correct English as used by native speakers. A notable example is instances of questions being grammatically constructed like statements. For instance, "How Unstoppable wallet works?" should be either "How Unstoppable wallet works:" (as a sentence fragment) or "How does Unstoppable wallet work?" as a question. I would like to make edits in a fork and submit a pull request for these edits.

Please comment on whether this would be a welcome editing improvement, so I know whether my work will be wasted. I expect to be able to get a pull request ready within a couple of days once I start.