In purchase order when you select Vendor and then try to coppy Billing address with special characters, Wrongly decoded string will be populated into address fields.

Fix #1287 Generates *Next Invoice Date* when enabling recurring ionvoice generation in Sales Orders (before this, when enabling recurring invoices for the first time, the *Next Invoice Date* was empty). Updates *Next Invoice Date* when *Start Perdiod* is updated to a date after *Next Invoice Date*. Eliminates legacy unused code.

Fix #1287 Create Field *Next Invoice Date* in SalesOrders from existing column in table vtiger_invoice_recurring_info.