Release v8.0.31

• [fix] _ is not defined while accessing the POS
• set variant name based on template name (#6367) (#8920)
• Don't update variant when template is updated (#8922)
• Set default account in mode-of-payment Cash, only if default cash account exists (#8909)
• [fix] allow editing of variant properties, reverting earlier fix (#8905)
• [fix] Remove recurring id on amendment only if it is same as amended_from