Purpose: Tell the user that Order can't be transited to Open status because Order's vendor is inactive.
Given I have a pending order
When opening the order (2 ways - click Open in Order details Pane or Save in Edit Order form with workflow status Open)
Then the system must check and validate that the vendor is Active
IF Vendor is inactive (it means the vendor could be deleted or has inactive status)
Then the system should display a modal - "This order cannot be open as the associated Vendor is Inactive" -
Then user must click "continue" to cancel operation and continue editing.
Acceptance criteria: Implement the code and write BigTest with a Mirage mocks (Inactive vendor and mock save order request in local test to return error response similar to the real back-end - to test the modal).