MDL-40872 Restore functionality of showrecentsubmissions setting
MDL-40843 recent_activity: corrections to grouping and user fields
MDL-40843 workshop: show user names in recent activity
MDL-40843 workshop: sort entries in recent activity block by time
Merge branch 'wip-MDL-40843-m25' of git://github.com/marinaglancy/moodle into MOODLE_25_STABLE