message: Add a comment about why we can't use apple-mobile-web-app-capable
diff: <link rel="manifest" href="/manifest-webapp.json">
  <link rel="mask-icon" href="/safari-pinned-tab.svg" color="#434444">
  <meta name="theme-color" content="#404141">
  + <!-- We cannot use this, because our OAuth flow redirects to another site, and Safari cannot bring us back. Thus we'll never be able to log in. -->
  + <!--<meta name="apple-mobile-web-app-capable" content="yes">-->
  <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
  {{#each htmlWebpackPlugin.files.css}}
  