   .pad-left {
      padding-left: 8px;
    }
    #scroller {
      overflow: auto;
    }
    .menu {
      color: black;
    }
  </style>

  <core-media-query query="min-width: 640px" queryMatches="{{wide}}"></core-media-query>
  <core-toolbar class="toolbar">
    <paper-menu-button>
      <paper-icon-button icon="menu" noink></paper-icon-button>
      <paper-dropdown class="dropdown">
        <core-menu class="menu">
          <template repeat="{{group, idx in groups}}">
            <pap