message: Improve Options page
diff: <link rel="stylesheet" href="options.css">
  <link rel="stylesheet" href="chrome://global/skin/in-content/common.css">
  <form id="options-form" class="detail-view-container">
  - <h2 class="only-firefox">Options</h2>
  <p>
  <label>
  <strong>Personal token</strong>, <a href="https://github.com/settings/tokens/new?description=Refined%20GitHub&scopes=repo" target="_blank">found here</a> (<a href="https://github.com/sindresorhus/refined-github/search?q=libs/api" target="_blank">some features</a> use the API)<br>
  <hr>
  - <p>
  - Want more features? Check out some <a href="https://github.com/sindresorhus/refined-github#related" target="_blank">related GitHub extensions</a> or <a href="https://github.com/sindresorhus/refined-github/blob/master/contributing.md" target="_blank">contribute</a>!
  - </p>
  -
  - <hr>
  -
  <p>
  If you're a GitHub Enterprise user, visit your Enterprise site, right-click on <a href="https://user-images.githubusercontent.com/1402241/32874388-e0c64150-cacc-11e7-9a50-eae3727fd3c2.png" target="_blank">Refined GitHub's icon in the toolbar</a> and select <strong>Enable Refined GitHub on this domain</strong>.
  </p>
  <hr>
  - <p>
  - <label>
  + <div>
  <strong>Features</strong><br>
  - <div class="js-features"></div>
  - </label>
  + <p>
  + <em>
  + Want more features? Check out some <a href="https://github.com/sindresorhus/refined-github#related"
  + target="_blank">related GitHub extensions</a> or <a
  + href="https://github.com/sindresorhus/refined-github/blob/master/contributing.md" target="_blank">contribute</a>!
  + </em>
  </p>
  + <div class="js-features"></div>
  + </div>
  +
  <hr>
  <p>
  