Protected branches system (#339)

* Protected branches system

* Moved default branch to branches section (`:org/:reponame/settings/branches`).
* Initial support Protected Branch.
  - Admin does not restrict
  - Owner not to limit
  - To write permission restrictions

* reformat tmpl

* finished the UI and add/delete protected branch response

* remove unused comment

* indent all the template files and remove ru translations since we use crowdin

* fix the push bug

templates/repo/settings/branches.tmpl

@@ -0,0 +1,91 @@
+{{template "base/head" .}}
+<div class="repository settings edit">
+	{{template "repo/header" .}}
+	<div class="ui container">
+		<div class="ui grid">
+			{{template "repo/settings/navbar" .}}
+			<div class="twelve wide column content">
+				{{template "base/alert" .}}
+				<h4 class="ui top attached header">
+					{{.i18n.Tr "repo.default_branch"}}
+				</h4>
+				<div class="ui attached table segment">
+					<form class="ui hook list form" action="{{.Link}}" method="post">
+						{{.CsrfTokenHtml}}
+						<input type="hidden" name="action" value="default_branch">
+						<div class="item">
+							The default branch is considered the "base" branch in your repository,
+							against which all pull requests and code commits are automatically made,
+							unless you specify a different branch.
+						</div>
+						{{if not .Repository.IsBare}}
+						<div class="ui grid padded">
+							<div class="eight wide column">
+								<div class="ui fluid dropdown selection visible" tabindex="0">
+									<select name="branch">
+										<option value="{{.Repository.DefaultBranch}}">{{.Repository.DefaultBranch}}</option>
+										{{range .Branches}}
+											<option value="{{.}}">{{.}}</option>
+										{{end}}
+          							</select><i class="dropdown icon"></i>
+									<div class="default text">{{.Repository.DefaultBranch}}</div>
+									<div class="menu transition hidden" tabindex="-1" style="display: block !important;">
+										{{range .Branches}}
+											<div class="item" data-value="{{.}}">{{.}}</div>
+										{{end}}
+									</div>
+								</div>
+							</div>
+						</div>
+						{{end}}
+						<div class="item field">
+							<button class="ui green button">{{$.i18n.Tr "repo.settings.update_settings"}}</button>
+						</div>
+					</form>
+				</div>
+
+				<h4 class="ui top attached header">
+					{{.i18n.Tr "repo.settings.protected_branch"}}
+				</h4>
+				<div class="ui attached table segment">
+					<div class="ui grid padded">
+						<div class="eight wide column">
+							<div class="ui fluid dropdown selection visible" tabindex="0">
+								<select id="protectedBranch" name="branch" data-url="{{.Repository.Link}}/settings/branches?action=protected_branch">
+									{{range .LeftBranches}}
+										<option value="">Choose a branch...</option>
+										<option value="{{.}}">{{.}}</option>
+									{{end}}
+								</select><i class="dropdown icon"></i>
+								<div class="default text">Choose a branch...</div>
+								<div class="menu transition hidden" tabindex="-1" style="display: block !important;">
+									{{range .LeftBranches}}
+										<div class="item" data-value="{{.}}">{{.}}</div>
+									{{end}}
+								</div>
+							</div>
+						</div>
+					</div>
+
+					<div class="ui grid padded">
+						<div class="sixteen wide column">
+							<table class="ui single line table padded">
+								<tbody>
+									{{range .ProtectedBranches}}
+										<tr>
+											<td><div class="ui large label">{{.BranchName}}</div></td>
+											<td class="right aligned"><button class="rm ui red button" data-url="{{$.Repository.Link}}/settings/branches?action=protected_branch&id={{.ID}}" data-val="{{.BranchName}}">Delete</button></td>
+										</tr>
+									{{else}}
+										<tr class="center aligned"><td>There is no protected branch</td></tr>
+									{{end}}
+								</tbody>
+							</table>
+						</div>
+					</div>
+				</div>
+			</div>
+		</div>
+	</div>
+</div>
+{{template "base/footer" .}}