Add when cancelling for external jobs, feedback:

https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/7508#note_18622182

spec/features/projects/pipelines_spec.rb

@@ -97,6 +97,13 @@ describe "Pipelines" do
         it 'has pipeline running' do
           expect(page).to have_selector('.ci-running')
         end
+
+        context 'when canceling' do
+          before { click_link('Cancel') }
+
+          it { expect(page).not_to have_link('Cancel') }
+          it { expect(page).to have_selector('.ci-canceled') }
+        end
       end
 
       context 'when failed' do