Comment fields stay tall after the comment is submitted #1977

1. Write a long comment on this issue
2. See the textarea expand
3. Submit the content
4. The textarea height should reset but it doesn't

This is probably because GitHub resets the content via .value = '' and that doesn't trigger the input event that fit-textarea waits for.

However, GitHub's own textarea resizer works correctly so they must have some other way to trigger this reset, like a custom event.