Rename button to "Finish Review"

Motivation: The meaning of the button is apparent from the visual
position and the number icon. This is not exposed to a screenreader.
Naming it to "Finish Review" helps with to provide the meaning of the
button as well as the number in the label.

(cherry picked from commit 87d4746)

options/locale/locale_en-US.ini

@@ -2596,7 +2596,7 @@ diff.comment.add_single_comment = Add single comment
 diff.comment.add_review_comment = Add comment
 diff.comment.start_review = Start review
 diff.comment.reply = Reply
-diff.review = Review
+diff.review = Finish review
 diff.review.header = Submit review
 diff.review.placeholder = Review comment
 diff.review.comment = Comment