Render only issues/mr in subnav depends on context

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

@@ -63,7 +63,7 @@
             Graphs
 
     - if project_nav_tab? :issues
-      = nav_link(controller: :issues) do
+      = nav_link(controller: [:issues, :labels, :milestones]) do
         = link_to url_for_project_issues(@project, only_path: true), title: 'Issues', class: 'shortcuts-issues' do
           = navbar_icon('issues')
           %span

app/views/projects/issues/_head.html.haml

 %ul.nav-links.sub-nav
   %div{ class: (container_class) }
-    - if project_nav_tab?(:issues)
+    - if project_nav_tab?(:issues) && current_controller?(:issues)
       = nav_link(controller: :issues) do
         = link_to url_for_project_issues(@project, only_path: true), title: 'Issues' do
           %span
             Issues
 
-    - if project_nav_tab?(:merge_requests)
+    - if project_nav_tab?(:merge_requests) && current_controller?(:merge_requests)
       = nav_link(controller: :merge_requests) do
         = link_to namespace_project_merge_requests_path(@project.namespace, @project), title: 'Merge Requests' do
           %span

features/project/active_tab.feature

@@ -107,12 +107,16 @@ Feature: Project Active Tab
 
   Scenario: On Project Issues/Milestones
     Given I visit my project's issues page
-    And I click the "Milestones" tab
-    Then the active main tab should be Milestones
+    And I click the "Milestones" sub tab
+    Then the active main tab should be Issues
+    Then the active sub tab should be Milestones
     And no other main tabs should be active
+    And no other sub tabs should be active
 
   Scenario: On Project Issues/Labels
     Given I visit my project's issues page
-    And I click the "Labels" tab
-    Then the active main tab should be Labels
+    And I click the "Labels" sub tab
+    Then the active main tab should be Issues
+    Then the active sub tab should be Labels
     And no other main tabs should be active
+    And no other sub tabs should be active

features/steps/project/active_tab.rb

@@ -77,14 +77,14 @@ class Spinach::Features::ProjectActiveTab < Spinach::FeatureSteps
 
   # Sub Tabs: Issues
 
-  step 'I click the "Milestones" tab' do
-    page.within('.layout-nav') do
+  step 'I click the "Milestones" sub tab' do
+    page.within('.sub-nav') do
       click_link('Milestones')
     end
   end
 
-  step 'I click the "Labels" tab' do
-    page.within('.layout-nav') do
+  step 'I click the "Labels" sub tab' do
+    page.within('.sub-nav') do
       click_link('Labels')
     end
   end
@@ -93,11 +93,11 @@ class Spinach::Features::ProjectActiveTab < Spinach::FeatureSteps
     ensure_active_sub_tab('Issues')
   end
 
-  step 'the active main tab should be Milestones' do
-    ensure_active_main_tab('Milestones')
+  step 'the active sub tab should be Milestones' do
+    ensure_active_sub_tab('Milestones')
   end
 
-  step 'the active main tab should be Labels' do
-    ensure_active_main_tab('Labels')
+  step 'the active sub tab should be Labels' do
+    ensure_active_sub_tab('Labels')
   end
 end

features/steps/shared/active_tab.rb

@@ -6,7 +6,7 @@ module SharedActiveTab
   end
 
   def ensure_active_sub_tab(content)
-    expect(find('div.content ul.nav-links li.active')).to have_content(content)
+    expect(find('.sub-nav li.active')).to have_content(content)
   end
 
   def ensure_active_sub_nav(content)
@@ -18,7 +18,7 @@ module SharedActiveTab
   end
 
   step 'no other sub tabs should be active' do
-    expect(page).to have_selector('div.content ul.nav-links li.active', count: 1)
+    expect(page).to have_selector('.sub-nav li.active', count: 1)
   end
 
   step 'no other sub navs should be active' do