Fix flaky work item notes actions test

Changelog: fixed

spec/support/shared_examples/features/work_items_shared_examples.rb

@@ -80,10 +80,13 @@ def set_comment
     it 'shows work item note actions' do
       set_comment
 
-      click_button "Comment"
-
+      send_keys([modifier_key, :enter])
       wait_for_requests
 
+      page.within(".main-notes-list") do
+        expect(page).to have_content comment
+      end
+
       page.within('.timeline-entry.note.note-wrapper.note-comment:last-child') do
         expect(page).to have_selector('[data-testid="work-item-note-actions"]')