MDL-33600 Assign: Allow teachers to skip notifying students about grade update.
MDL-33600 Assign: Add an admin setting to set the default for sendstudentnotifications
Merge remote-tracking branch 'github/MMCC_26' into MDL-33600-MMCC
Styling fixes to Tables of Contents for Book
-Added CSS classes to chapters
-Changed styling to enable chapters to visually stand out better
-Removed clearfix when viewing bulleted list
-Other minor cleanup
Merge branch 'wip-book_toc_CSS-MMCC_26', remote-tracking branch 'github/MMCC_26' into wip-book_toc_CSS-MMCC_26
Merge branch 'MMCC_26' of https://github.com/itg/moodle into wip-book_toc_CSS-MMCC_26