Add missing 'new migration' link

Addresses issue #399

templates/user/dashboard/dashboard.tmpl

@@ -58,6 +58,7 @@
                     </button>
                     <ul class="menu menu-vertical drop-down" id="dashboard-new-repo-menu">
                         <li><a href="/repo/create"><i class="octicon octicon-repo-create"></i>{{.i18n.Tr "new_repo"}}</a></li>
+                        <li><a href="/repo/migrate"><i class="octicon octicon-repo-clone"></i>{{.i18n.Tr "new_migrate"}}</a></li>
                         <li><a href="/org/create"><i class="octicon octicon-organization"></i>{{.i18n.Tr "new_org"}}</a></li>
                     </ul>
                 </li>