Make filter toggle button into a component

[jniles]

We use this code everywhere:

      <div class="toolbar-item">
        <button
          type="button"
          ng-click="ConfigurationCtrl.toggleFilter()"
          data-method="filter"
          class="btn btn-default"
          ng-class="{ 'btn-info' : ConfigurationCtrl.filterEnabled }">
          <i class="fa fa-filter"></i>
        </button>
      </div>

It is ripe for a component to standardize its look and operation. Something like:

<bh-filter-toggle on-toggle="ConfigurationCtrl.toggleFilter()"></bh-filter-toggle>