* add mode of payment field to Payment Term
* add mode of payment field to Payment Terms Template Detail
* add mode of payment field to Payment Schedule
* add mode of payment in `get_payment_term_details`
* pass bill_date as parameter and calculate due_date on that basis
* calculate payment_schedule on the basis of bill_date if present else posting_date
* add bill_date as an argument to get_party_details
* pass bill_date on supplier trigger in purchase invoice
* Patch: Create Payment Terms based on default credit days set in company and use it while setting due_date
* Payment Terms patch for credit days defined in customer group
* validate schedule dates in non-invoice documents
* change query for orders
* take care of orders with/without payment schedule
* clean up, refactor, PEP8
* Revert "test fixed (#12094)"
This reverts commit dd700a550f.
* Revert "[fix] Column Heading in received item to be billed report (#12083)"
This reverts commit 7c57b6ecd8.
* Revert "[fix] Mobile no search issue in the pos (#12090)"
This reverts commit b725affe0c.
* Revert "[Fix] Payment terms validation issue (#12092)"
This reverts commit 9b8e1cb10e.
* [enhance] Opening Invoice Tool create Opening Sales/Purchase Invoices
* [minor] added progress bar while creating invoice
* [minor] allow bulk upload for the invoices
* [minor] calculate item rate from net total
* [minor] added defaults for invoices fields, create gl entries only if grand_total is greater than 0
* [minor] check mandatory values before making opening invoices
* [minor] enable primary button if there is any error while creating invoices
* [minor] minor fixes, set company currency as invoice currency added tests
* [dashboard] added Opening Invoice Summery section in Dashboard
* [minor] added total invoices count on dashboard
* [minor] don't show dashboard if there are no opening invoices available
* [minor] added Opening Invoice Tools to Account's Tools section
* [minor] codecy fixes
* [fix] refactored general ledger and buttons on charts
* [fix] tests
