The concurrency control that notifies when 2 people are editing the same document, and then attempts to prevent overwriting data, fails on Safari.

Steps to reproduce:
1. Person 1 clicks Edit button on a page.
2. Edit page loads for Person 1.
3. Person 2 clicks Edit on the same page.
4. Edit page loads for Person 2 with warning message "This page is being edited by Person 1".
5. Person 1 clicks Save.
6. Page is saved without any warning message.
7. Person 2 clicks Save.
8. Page is saved without any warning message, overwriting Person 1's changes.

Expected:
As is the behavior with Firefox and Chrome, when Person 2 attempts to Save they will be presented with A list of changes that person 1 made, and can then decide to override or manually incorporate Person 1's changes.

Actual:
Person 2 clicks Save and immediately overwrites Person 1's changes.

Proposed:
We need to identify why the behavior is different in Safari and ensure consistency across browsers.