[IMP] account, usability: little big details

* Fiscal positions: add stat button for 'Active' (instead of checkbox )
* Customer Invoice line form view no need for purchase order remove(or hide in customer invoice) and put Anallytic tag field in form view
* Currencies sorted based on active field (so we can see all active currency first)
* Improve graph for bank and cash journals on dashboard: based on ending balance and statement lines.

Was PR #14833. Was task 29541