Display branch name in delete branch confirmation modal. (#5654)

Fixes: #5630.

public/js/index.js

     if ($('.repository.settings.options').length > 0) {
         $('#repo_name').keyup(function () {
             var $prompt = $('#repo-name-change-prompt');
-            if ($(this).val().toString().toLowerCase() != $(this).data('repo-name').toString().toLowerCase()) {
+            if ($(this).val().toString().toLowerCase() != $(this).data('name').toString().toLowerCase()) {
                 $prompt.show();
             } else {
                 $prompt.hide();
     }
 
     var dialog = $('.delete.modal' + filter);
-    dialog.find('.repo-name').text($this.data('repo-name'));
+    dialog.find('.name').text($this.data('name'));
 
     dialog.modal({
         closable: false,

templates/admin/repo/list.tmpl

 							<td>{{.NumIssues}}</td>
 							<td>{{SizeFmt .Size}}</td>
 							<td><span title="{{.CreatedUnix.FormatLong}}">{{.CreatedUnix.FormatShort}}</span></td>
-							<td><a class="delete-button" href="" data-url="{{$.Link}}/delete?page={{$.Page.Current}}" data-id="{{.ID}}" data-repo-name="{{.Name}}"><i class="trash icon text red"></i></a></td>
+							<td><a class="delete-button" href="" data-url="{{$.Link}}/delete?page={{$.Page.Current}}" data-id="{{.ID}}" data-name="{{.Name}}"><i class="trash icon text red"></i></a></td>
 						</tr>
 					{{end}}
 				</tbody>
 	</div>
 	<div class="content">
 		<p>{{.i18n.Tr "repo.settings.delete_desc"}}</p>
-		{{.i18n.Tr "repo.settings.delete_notices_2" `<span class="repo-name"></span>` | Safe}}<br>
+		{{.i18n.Tr "repo.settings.delete_notices_2" `<span class="name"></span>` | Safe}}<br>
 		{{.i18n.Tr "repo.settings.delete_notices_fork_1"}}<br>
 	</div>
 	{{template "base/delete_modal_actions" .}}

templates/repo/branch/list.tmpl

 										{{else if .IsDeleted}}
 											<a class="undo-button" href data-url="{{$.Link}}/restore?branch_id={{.DeletedBranch.ID | urlquery}}&name={{.DeletedBranch.Name | urlquery}}"><i class="octicon octicon-reply"></i></a>
 										{{else}}
-											<a class="delete-branch-button" href data-url="{{$.Link}}/delete?name={{.Name | urlquery}}" data-val="{{.Name}}"><i class="trash icon text red"></i></a>
+											<a class="delete-branch-button" href data-url="{{$.Link}}/delete?name={{.Name | urlquery}}" data-name="{{.Name}}"><i class="trash icon text red"></i></a>
 										{{end}}
 										</td>
 									{{end}}
 <div class="ui small basic delete modal">
 	<div class="ui icon header">
 		<i class="trash icon"></i>
-		{{.i18n.Tr "repo.branch.delete_html"}} <span class="branch-name"></span>
+		{{.i18n.Tr "repo.branch.delete_html"}} <span class="name"></span>
 	</div>
 	<div class="content">
 		<p>{{.i18n.Tr "repo.branch.delete_desc" | Str2html}}</p>