Improve style on marking guide comments

[Jeremy Hopkins]

This code improves style on stored comments in advanced grading / marking guide and needs to be added to the stylesheet:

.gradingform_guide .criterion .description {
    width: 100%;
    padding: 10px 5px 10px 5px;
}

[Info 3bits]

fix #330 #532

→ <<cset d83520539f40>>