Keyword not found recommendations

For issue #888.
Does `Run` prefix here mean that the tests uses the missing keyword via `Run Keyword`? That's not too obvious from the name.

It's a good point that this new functionality should be tested with `Run Keyword` too. In the end that should use exactly same logic, so I doubt all scenarios need to be tested both with and without it. Having just one test like `Wrapped to Run Keyword` that tests the basic functionality would probably be enough.