Release v6.12.0

• [translations]
• [minor] catch illegal reference, via error report
• [fixes] [ux] get product bundle items only on po, mr and button on toolbar
• [feature] Allowed custom root accounts in Chart of Accounts
• [minor] Set expense account as Stock RBNB for perpetual inventory after mapping
• [fix] Invoicing against drop-ship Purchase Order
• [fix] Show 'Make Purchase Receipt' button in PO even if all items are non-stock items
• [fix] Total Amount in Journal Entry in bank currency
• [fix] Bank Reconciliation in account currency
• [minor] system settings in setup wizard moved to frappe
• [fixes] stock reco, must always set qty and rate
• [minor] [translation] fix #4343
• [minor] fix error message