Remove app_menu and project_menu partials

Now it's consistent across layouts where their main menus are.

app/views/layouts/application.html.haml

@@ -5,6 +5,20 @@
     = render "layouts/flash"
     = render "layouts/head_panel", title: "Dashboard"
     .container
-      = render partial: "layouts/app_menu"
-      .content
-        = yield
+      %ul.main_menu
+        = nav_link(path: 'dashboard#index', html_options: {class: 'home'}) do
+          = link_to "Home", root_path, title: "Home"
+        = nav_link(path: 'dashboard#issues') do
+          = link_to dashboard_issues_path do
+            Issues
+            %span.count= current_user.assigned_issues.opened.count
+        = nav_link(path: 'dashboard#merge_requests') do
+          = link_to dashboard_merge_requests_path do
+            Merge Requests
+            %span.count= current_user.cared_merge_requests.count
+        = nav_link(path: 'search#show') do
+          = link_to "Search", search_path
+        = nav_link(path: 'help#index') do
+          = link_to "Help", help_path
+
+      .content= yield