message: Only show the first line of each commit in changelog dialog
  Multi-line commits aren't actually formatted correctly, and most likely the
  first line is enough of a summary anyway, so this change trims to the first
  line. The commits are linked, so you can click through if you want more detail.
  Fixes
diff: @@ -51,7 +51,7 @@ export default class ChangelogDialog extends React.Component {
  return (
  <li key={commit.sha} className="mx_ChangelogDialog_li">
  <a href={commit.html_url} target="_blank" rel="noopener">
  - {commit.commit.message}
  + {commit.commit.message.split('\n')[0]}
  </a>
  </li>
  );
  