Update number of Todos in the sidebar when it's marked as "Done"

app/views/layouts/nav/_dashboard.html.haml

@@ -9,7 +9,7 @@
       = icon('bell fw')
       %span
         Todos
-        %span.count= number_with_delimiter(todos_pending_count)
+        %span.count.todos-pending-count= number_with_delimiter(todos_pending_count)
   = nav_link(path: 'dashboard#activity') do
     = link_to activity_dashboard_path, class: 'shortcuts-activity', title: 'Activity' do
       = icon('dashboard fw')

features/steps/dashboard/todos.rb

@@ -26,6 +26,7 @@ class Spinach::Features::DashboardTodos < Spinach::FeatureSteps
   end
 
   step 'I should see todos assigned to me' do
+    page.within('.nav-sidebar') { expect(page).to have_content 'Todos 4' }
     expect(page).to have_content 'To do 4'
     expect(page).to have_content 'Done 0'
 
@@ -41,6 +42,7 @@ class Spinach::Features::DashboardTodos < Spinach::FeatureSteps
       click_link 'Done'
     end
 
+    page.within('.nav-sidebar') { expect(page).to have_content 'Todos 3' }
     expect(page).to have_content 'To do 3'
     expect(page).to have_content 'Done 1'
     should_not_see_todo "John Doe assigned you merge request !#{merge_request.iid}"