FIX: pick-files-button component (PR #14045)

A file should be accepted if it has supported extension OR supported MIME type.

GitHub

Is it expected for tests to still be skipped?

Is it expected for tests to still be skipped?

Yes, I have a reminder set, going to try to address it later.

Now tests pass in Ember CLI, but for some reason, when running in the legacy environment the component receives an empty list of files after calling await triggerEvent("input[type='file']", "change", { files: [file] });