Allow greater customisation of Purchase Orders. There is currently limited ability to customise Purchase Orders, compared to Invoices

For example. whilst invoices can show Project Names, purchase orders don't. Also, we would like to use the Purchase Orders created through Kashflow as "Payment Certificates" (i.e. certificates acknowledging the supplier's invoice and telling them how much we are paying them and how much we are deducting for retentions and CIS tax purposes (we are a construction business). We would therefore like to rename "Purchase Orders" to "Payment Certificates"