Finish changing user-visible "Submitted" to "Completed".
Review Request #13520 — Created Feb. 5, 2024 and submitted — Latest diff uploaded
In order to make things less confusing, we changed the very
perforce-like "Close > Submitted" to be "Close > Completed".
Unfortunately we missed a few places, such as the labels in the "All
Review Requests" datagrid and the review request infobox. This change
updates those to match.
Ran unit tests.