[IMP] Make the function to get draft invoices overridable, since some companies can have workflows where several states are still considered 'Draft'
[IMP] Make the function to get draft invoices overridable, since some companies can have workflows where several states are still considered 'Draft'

kmee/account-invoicing,brain-tec/account-invoicing,kmee/account-invoicing,brain-tec/account-invoicing,acsone/account-invoicing,acsone/account-invoicing