Merge branch '354475-wait-for-button-enabled' into 'master'

Wait for commit button to become enabled

See merge request gitlab-org/gitlab!82846

qa/qa/page/project/pipeline_editor/show.rb

@@ -77,6 +77,7 @@ module QA
           end
 
           def submit_changes
+            Support::Waiter.wait_until { !find_element(:commit_changes_button).disabled? }
             click_element(:commit_changes_button)
 
             wait_for_requests