Resurrected fix for minor edits and improved ordering of answers beneath questions, and PostRevisions in admin list view.

Re-applied the change for https://trello.com/c/JGQ2LjvV/340-editor-of-minor-edit-not-to-show-as-last-person-to-update-a-question-on-main-question-list, which got dropped somehow, presumably during modal merge. The absence of that fixed behaviour got re-raised today at https://trello.com/c/zeM2dKQM/473-investigate-possible-issue-with-minor-edit).