Purchase order Planning

How it works:
Purchase orders generated by min/max rules will instead be "Planned Orders". These orders will be contained in a separate menu and have a unique filter to sort them by. Each time the scheduler activates it will first delete all purchase orders in planned state, and then recalculate the min/max rules to decide what should be ordered. These will remain in a neutral state of "planned" and will not affect stock unless a user confirms the purchase order.

The purchase orders will be updated dynamically instead of being merged creating a single naming convention per order "Planned Order/1234" This way the generated orders will be accurate, and can be converted into a real purchase order no different than if someone manually created it.