Avoid quick action prompt blocking preview button

spec/support/helpers/features/notes_helpers.rb

@@ -23,8 +23,18 @@ module Spec
 
           def preview_note(text)
             page.within('.js-main-target-form') do
-              fill_in('note[note]', with: text)
+              filled_text = fill_in('note[note]', with: text)
+
+              begin
+                # Dismiss quick action prompt if it appears
+                filled_text.parent.send_keys(:escape)
+              rescue Selenium::WebDriver::Error::ElementNotInteractableError
+                # It's fine if we can't escape when there's no prompt.
+              end
+
               click_on('Preview')
+
+              yield if block_given?
             end
           end
         end

spec/support/shared_examples/quick_actions/issuable/close_quick_action_shared_examples.rb

 # frozen_string_literal: true
 
 shared_examples 'close quick action' do |issuable_type|
+  include Spec::Support::Helpers::Features::NotesHelpers
+
   before do
     project.add_maintainer(maintainer)
     gitlab_sign_in(maintainer)
@@ -76,10 +78,7 @@ shared_examples 'close quick action' do |issuable_type|
     it 'explains close quick action' do
       visit public_send("project_#{issuable_type}_path", project, issuable)
 
-      page.within('.js-main-target-form') do
-        fill_in 'note[note]', with: "this is done, close\n/close"
-        click_on 'Preview'
-
+      preview_note("this is done, close\n/close") do
         expect(page).not_to have_content '/close'
         expect(page).to have_content 'this is done, close'
         expect(page).to have_content "Closes this #{issuable_type.to_s.humanize.downcase}."