WP Ultimo 2.0.13

* Improvement: Set the first period in period selector as pre-selected if durations is not added before, preventing the mixing of products with different period if using the selector; * Improvement: Removed verification for existing signatures in v1, reducing the chance of false negatives as the need to run migration process; * Fixed: Stripe card check causing error with multi step forms wen using the product slug in url; * Fixed: Product variations not being identified and not setting the price on cart overview; * Fix: Get the correct address field in form to set the cart regardless of multi step or single step form type; * Fix: Stripe checkout not working on Firefox; * Fix: Delete option on broadcast admin list table; * Fix: Broadcast list table causing fatal due error on customers column; * Fix: Email footer with subsite url on link instead of main site;