upgrade new issue to SUI v2

templates/repo/pulls/compare.tmpl

@@ -1,7 +1,7 @@
 {{template "base/head" .}}
 <div class="repository compare pull">
 	{{template "repo/header" .}}
-	<div class="ui middle page grid body">
+	<div class="ui container">
 		<div class="sixteen wide column page grid">
 			<h2 class="ui header">
 			  {{.i18n.Tr "repo.pulls.compare_changes"}}
@@ -9,7 +9,7 @@
 			</h2>
 			<div class="ui segment choose branch">
 				<span class="octicon octicon-git-compare"></span>
-				<div class="ui floating filter dropdown">
+				<div class="ui floating filter dropdown" data-no-results="{{.i18n.Tr "repo.pulls.no_results"}}">
 					<div class="ui basic small button">
 				    <span class="text">base: {{$.BaseBranch}}</span>
 					  <i class="dropdown icon"></i>