Fix flickering custom action button title on the work package page.

Author: dombesz

Diff for: modules/boards/spec/features/support/board_page.rb

@@ -217,6 +217,7 @@ def add_list_with_new_value(name)
 
     def save
       page.find(".editable-toolbar-title--save").click
+      wait_for_lists_reload
       expect_and_dismiss_toaster message: "Successful update."
     end