* fixes so we match the transformer based on name properly.

* changed the signature on the FieldMatcher.

* introduced a names option so you can filter in name specificly.

* changed so the matcher UI uses the new options format.

* moved the exported functions together.

* changing editors a bit.

* made the filter by name work with both regex and name filtering.

* fixed failing tests and make sure we always parse regex the same way.

* removed unused code.

* simplified to make the existing field overrides still working.

* fixed issue reported by hugo.

* added tests for the name matcher.

* added tests for filter by name.

* added more tests.