Orders List: Enable filtering

[aforcier]

Add filter button to orders list screen, allowing the user to filter the list by order status:

FluxC

• Convert the OrderStatus class from a static object to an enum class. This is to allow for more flexibility in iterating over the various values.

UI

• Create new order list filter dialog
• Add filter icon to the toolbar for the Orders List view
• Add the logic to pass filter selections to the list to apply