grafana/public/app/partials/metrics.html

<div class="editor-row">

	<!-- <div ng&#45;include src="datasource.meta.partials.query"></div> -->

	<query-editor-loader ng-repeat="target in panel.targets">
	</query-editor-loader>

 	</div>
</div>

<div class="editor-row" style="margin-top: 30px">
	<button class="btn btn-inverse pull-right" ng-click="addDataQuery(panel.target)">
		<i class="fa fa-plus"></i>&nbsp;
		Add query
	</button>

  <div class="pull-right dropdown" style="margin-right: 10px;">
		<button class="btn btn-inverse dropdown-toggle" data-toggle="dropdown" bs-tooltip="'Datasource'">
			<i class="fa fa-database"></i>&nbsp;
			{{datasource.name}} <span class="caret"></span>
		</button>

    <ul class="dropdown-menu" role="menu">
      <li ng-repeat="datasource in datasources" role="menuitem">
        <a ng-click="setDatasource(datasource.value);">{{datasource.name}}</a>
      </li>
    </ul>
  </div>

	<div class="clearfix"></div>
</div>