Fix failing tests that simulated a click against the DOM

The now-deprecated `.trigger('click')` API simulated a click against
the DOM rather a click on the UI, which made our tests fragile and
wouldn't simulate actual user interaction

spec/features/comments/legislation_annotations_spec.rb

@@ -620,7 +620,7 @@ feature 'Commenting legislation questions' do
 
     scenario 'View comments of annotations in an included range' do
       within("#annotation-link") do
-        first(:css, "a").click
+        find('.icon-expand').click
       end
 
       expect(page).to have_css(".comment", count: 2)
@@ -656,7 +656,7 @@ feature 'Commenting legislation questions' do
       end
 
       within("#annotation-link") do
-        first(:css, "a").click
+        find('.icon-expand').click
       end
 
       expect(page).to have_css(".comment", count: 3)
@@ -667,7 +667,7 @@ feature 'Commenting legislation questions' do
 
     scenario "Reply on a multiple annotation thread and display it in the single annotation thread" do
       within("#annotation-link") do
-        first(:css, "a").click
+        find('.icon-expand').click
       end
 
       comment = annotation2.comments.first