Misc Observatory tweaks.

runtime/observatory/lib/src/elements/timeline_page.dart

Index: runtime/observatory/lib/src/elements/timeline_page.dart
diff --git a/runtime/observatory/lib/src/elements/timeline_page.dart b/runtime/observatory/lib/src/elements/timeline_page.dart
index ba93c704af6ecf7ba81932089dcaa4bcede669ed..d7dcb2fe9837a952f03364cb2c5a1279f76ae063 100644
--- a/runtime/observatory/lib/src/elements/timeline_page.dart
+++ b/runtime/observatory/lib/src/elements/timeline_page.dart
@@ -11,8 +11,10 @@ import 'package:observatory/service.dart' as S;
 import 'package:observatory/service_html.dart' as SH;
 import 'package:observatory/models.dart' as M;
 import 'package:observatory/src/elements/helpers/nav_bar.dart';
+import 'package:observatory/src/elements/helpers/nav_menu.dart';
 import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
 import 'package:observatory/src/elements/helpers/tag.dart';
+import 'package:observatory/src/elements/helpers/uris.dart';
 import 'package:observatory/src/elements/nav/notify.dart';
 import 'package:observatory/src/elements/nav/refresh.dart';
 import 'package:observatory/src/elements/nav/top_menu.dart';
@@ -126,6 +128,7 @@ class TimelinePageElement extends HtmlElement implements Renderable {
         navBar([
           new NavTopMenuElement(queue: _r.queue),
           new NavVMMenuElement(_vm, _events, queue: _r.queue),
+          navMenu('timeline', link: Uris.timeline()),
           new NavRefreshElement(queue: _r.queue)
             ..onRefresh.listen((e) async {
               e.element.disabled = true;