Follow up for #1990 improves test by using watch_for

test/browser/agent_ticket_create_cc_tokenizer_test.rb

@@ -5,7 +5,7 @@ require 'browser_test_helper'
 #
 # Ensure that CC field when creating a new ticket is autocompleting user emails
 
-class AgentTicketCreateResetCustomerSelectionTest < TestCase
+class AgentTicketCreateCcTokenizerTest < TestCase
   def test_tokenizer
     @browser = browser_instance
 
@@ -20,13 +20,24 @@ class AgentTicketCreateResetCustomerSelectionTest < TestCase
       css: 'a[href="#ticket/create"]'
     )
 
-    @browser.find_element(:css, 'li[data-type=email-out]').click
+    email_out_css = '.content.active li[data-type=email-out]'
+
+    watch_for(
+      css: email_out_css
+    )
+
+    click(css: email_out_css)
+
+    watch_for(
+      css: '.content.active input[name=cc]',
+      displayed: true
+    )
 
     elem = @browser.find_element(:name, 'cc')
     elem.send_keys 'test@example.com'
     elem.send_keys :enter
 
-    exists(
+    watch_for(
       css: '.token-label',
       value: 'test@example.com'
     )