Merge branch 'qa-shl-wait-for-requests-within-sidebar' into 'master'

Set wait_for_requests before proceeding in within_sidebar

See merge request gitlab-org/gitlab!41735

qa/qa/page/sub_menus/common.rb

@@ -12,6 +12,8 @@ module QA
         end
 
         def within_sidebar
+          wait_for_requests
+
           within_element(sidebar_element) do
             yield
           end