Make Phriction diff-of-changes view draft-aware and clarify some language master
Summary: Ref T13077. Ref T13197. See PHI840. - In the "History > Diff/Compare" view, the button language wasn't draft-aware. - Revise language to avoid the word "Revert", since this can be ambiguous. - "Edit this page, starting with an older version of the text" is now "Edit Older|Current|Draft Version X". - "Mark this older version of the page as the current published version" is now "Publish Older Version". - Let the user edit the current published version, too, since this is a reasonable operation if there are drafts. Test Plan: Navigated the history diff view, saw better button and action text. Reviewers: amckinley Reviewed By: amckinley Maniphest Tasks: T13197, T13077 Differential Revision: https://secure.phabricator.com/D19668