fix(templating): very minor markup/css change

public/app/features/templating/partials/editor.html

@@ -39,7 +39,7 @@
 		<div ng-if="mode === 'list'">
 
 			<div class="editor-row row">
-				<div class="span8">
+				<div style="max-width: 1024px">
 					<div ng-if="variables.length === 0">
 						<em>No template variables defined</em>
 					</div>