Inconsistencies with New Order button

[marcalwestf]

Bug report

Right after start the POS it appears to be empty; there is a New Order button, but it doesn't allow to create an Order. There are some other inconsistencies.

Steps to reproduce

1. Do a Cache Reset
2. Start a POS (-> an empty POS Order appears with a button New Order which is disabled).
3. Clicking on button New Order produces nothing.
4. Open slider Quick Point of Sales Options and select Sales Order/Cancel Order (-> an Order Canceled message is displayed, but nothing happens). Selecting Cancel Order either does nothing or cancels the present order and creates a new one.
5. The New Order button appears also when an order is selected from Order history.
6. The New Order button is still there and seems not to have a concrete function.

Screenshot or Gif

Expected behavior

1. If the goal of the button is to show that we are in a new Order, it should be a label, title, etc., but not a button indicating it. It should be evident that the user cannot click on it.
2. Displaying New Order on an existing Order from history is not meaningful.
3. If we're in a new Order, button Cancel Order should be synchronized with the Order displayed, i.e. it should be available only when it can be canceled.
4. To cancel an order should not be so complicated as to do it in three steps ( click small arrow to open Quick Point of Sales Options, then select Sales Order ans lastly click on Cancel Order).