Resolve "Navigating to another group board breaks navigation sidebar"

app/views/layouts/nav/sidebar/_group.html.haml

@@ -3,7 +3,7 @@
 
 - issues_sub_menu_items = ['groups#issues', 'labels#index', 'milestones#index']
 - if @group.feature_available?(:group_issue_boards)
-  - issues_sub_menu_items.push('boards#index')
+  - issues_sub_menu_items.push('boards#index', 'boards#show')
 
 .nav-sidebar{ class: ("sidebar-icons-only" if collapsed_sidebar?) }
   .nav-sidebar-inner-scroll
@@ -64,7 +64,7 @@
                 List
 
           - if @group.feature_available?(:group_issue_boards)
-            = nav_link(path: 'boards#index') do
+            = nav_link(path: ['boards#index', 'boards#show']) do
               = link_to group_boards_path(@group), title: 'Boards' do
                 %span
                   Boards

spec/features/boards/multiple_boards_spec.rb

@@ -143,6 +143,16 @@ describe 'Multiple Issue Boards', :js do
 
         expect(page).to have_selector('.board', count: 2)
       end
+
+      it 'maintains sidebar state over board switch' do
+        assert_boards_nav_active
+
+        find('.boards-switcher').click
+        wait_for_requests
+        click_link board2.name
+
+        assert_boards_nav_active
+      end
     end
 
     context 'unauthorized user' do
@@ -195,4 +205,8 @@ describe 'Multiple Issue Boards', :js do
       expect(page).to have_content('Some of your boards are hidden, activate a license to see them again.')
     end
   end
+
+  def assert_boards_nav_active
+    expect(find('.nav-sidebar .active .active')).to have_selector('a', text: 'Boards')
+  end
 end