fix layout

Author: wxiaoguang

templates/repo/header.tmpl

@@ -242,12 +242,10 @@
 				{{end}}
 			</div>
 		{{else if .Permission.IsAdmin}}
-			<div class="ui tabular menu navbar">
-				<div class="right item">
-					<a class="{{if .PageIsRepoSettings}}active {{end}}item" href="{{.RepoLink}}/settings">
-						{{svg "octicon-tools"}} {{.locale.Tr "repo.settings"}}
-					</a>
-				</div>
+			<div class="ui tabular menu navbar gt-overflow-x-auto gt-overflow-y-hidden">
+				<a class="{{if .PageIsRepoSettings}}active {{end}}right item" href="{{.RepoLink}}/settings">
+					{{svg "octicon-tools"}} {{.locale.Tr "repo.settings"}}
+				</a>
 			</div>
 		{{end}}
 	</div>

templates/repo/issue/milestone_issues.tmpl

@@ -50,7 +50,7 @@
 				{{template "repo/issue/openclose" .}}
 			</div>
 			<div class="ten wide right aligned column">
-				<div class="ui secondary filter menu labels">
+				<div class="ui secondary filter stackable menu labels">
 					<!-- Label -->
 					<div class="ui {{if not .Labels}}disabled{{end}} dropdown jump item label-filter" style="margin-left: auto">
 						<span class="text">