add warning to plot items

beat/web/reports/static/reports/app/directives/groupPlotItem.js

@@ -68,7 +68,10 @@ angular.module('reportApp')
 	class="panel-collapse collapse in"
 	role="tabpanel"
 	aria-labelledby="{{domId}}-heading">
-	{{ id }} content
+	<div class='panel-body'>
+		<p>{{ id }} content</p>
+		<strong>Plot items in reports are not implemented yet.</strong>
+	</div>
 </div>
 `
 	};