Mark In process items as Missing

1. Scenario
   • Given an item that is In process
   • When the pane header menu is opened
   • Then display the Mark as missing option
2. Scenario
   • Given the Mark as missing option
   • When selected
   • Then display the confirmation modal
     • title of modal: Confirm item as missing
     • Text of modal: <title> (<material type>) (Barcode: <barcode>) will be marked as Missing.
     • Modal buttons:
       • Cancel
       • Confirm
3. Scenario
   • Given the missing confirmation modal
   • When the user selects Confirm
   • Then change item's status to Missing
     • Display Missing in Item status field
     • Display date and time of confirmation as Item status date
4. Scenario
   • Given the missing confirmation modal
   • When the user selects Cancel
   • Then close the modal and do not change item's status

Notes: Marking items as Missing was done in UIIN-419; this story extends that to In process items.