Purpose: Provide a mechanism for Opening orders that are currently pending such that the user is not required to click edit and manually update the PO status.
Given the user has created a pending PO with at least 1 POL
When viewing the PO
Then the user should see an "Open" button in the top right corner of the third pane
Given the user can see the "Open" button
When the user clicks "Open"
Then the order workflow status should be set to Open