fix(graph): type in html

public/app/plugins/panel/graph/styleEditor.html

@@ -1,4 +1,4 @@
-<div class="editor-row gf-form-row">
+<div class="editor-row gf-form-group">
   <div class="section">
     <h5>Chart Options</h5>
 		<editor-opt-bool text="Bars" model="ctrl.panel.bars" change="ctrl.render()"></editor-opt-bool>