Optimistic locking: Display a Conflict Detection banner

As a user
I want to be informed when a record update conflict has been detected
So I can stop working on updating the older version of the record

Requirement

• Apply to the following edit record screens: Instance, Holdings, and Item

• If user hits Save and a conflict is detected then display Conflict detection banner
  • Implement STCOM-889
  • Display message under paneheader - Mockup - https://drive.google.com/file/d/10d8iELI694Mgsi5RtRfs1ppCgrPp9WLB/view

• If an Instance record then clicking View latest version link displays AS IF the user hit Save & close AND three pane view with an updated Instance record in the third pane DISPLAYS in a new tab/window
  • If possible have focus go to the instance record pane header.

• If a Holdings record then clicking View latest version link displays AS IF the user hit Save & close AND updated Holdings record DISPLAYS in a new tab/window
  • Have focus go to the Holdings pane header

• If an Item record then clicking View latest version link displays AS IF the user hit Save & close AND updated Item record DISPLAYS in a new tab/window
  • Have focus go to the Item pane header

• If user hits Cancel or X on the Instance/Holdings/Item then no change to current UX behavior > Show Are you sure modal?
• When user hits Save & close, make sure focus returns or remains on the conflict detection banner.

Scenarios:
Given the user A is editing a instance/holdings/item record
AND user B has just edited and saved the same is instance/holdings/item record
Thus user A is not editing the latest version
When user A hits Save on that instance/holdings/item record
Then display the conflict detection banner right below the paneheader

Given conflict detection banner displays on a instance/holdings/item record
When user A clicks on View latest version
Then display AS IF the user hit Save & close

Given conflict detection banner displays on instance/holdings/item record
When user A hits Cancel or X
Then display the Are you sure? modal as supported today

Given conflict detection banner displays on the instance/holdings/item record
When user A hits Save again
Then shift focus to the conflict detection modal