Fix auto-focus username for login form

tailbone/templates/login.mako

@@ -57,5 +57,15 @@
   </div>
 </%def>
 
+<%def name="modify_this_page_vars()">
+  <script type="text/javascript">
+
+    TailboneForm.mounted = function() {
+        this.$refs.username.focus()
+    }
+
+  </script>
+</%def>
+
 
 ${parent.body()}