Fix this crazy random failing test

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

features/steps/project/commits/commits.rb

@@ -98,4 +98,8 @@ class Spinach::Features::ProjectCommits < Spinach::FeatureSteps
   step 'I see inline diff button' do
     expect(page).to have_content "Inline"
   end
+
+  step 'I click side-by-side diff button' do
+    find('#parallel-diff-btn').click
+  end
 end

features/steps/shared/diff_note.rb

@@ -198,7 +198,7 @@ module SharedDiffNote
   end
 
   step 'I click side-by-side diff button' do
-    find('#parallel-diff-btn').click
+    find('#parallel-diff-btn').trigger('click')
   end
 
   step 'I see side-by-side diff button' do