MDL-11275 added (submissions). Also fixed :

MDL-11275 added (submissions). Also fixed :
Issue:
    Teachers can edit grader report preferences (including switches for quickgrading and
    quickfeedback), but do not have access to the "Turn editing on/off" button, so they
    can't do quickgrading.
Solutions:
    1.Decouple the quickgrading and quickfeedback modes from the editing mode,
        and turn them on/off through the preferences page. New capability: moodle/grade:edit
        * preferences: don't show quickgrading if no capability grade:edit
        * If quickgrading is switched off as a preference and user doesn't have manage cap, show edit icons around grades when in editing mode