Opacity problem in hidden sections

[jrm-unamur]

Hi Bas,
When a section is hidden, opacity is set to 0.5 on the '

' element, children elements thus inheriting this property. There is a poblem with the collapsible menus on the right hand side of the section. If one of these menus overlaps a non-hidden section, edit buttons for this section can be seen by transparency (see screenshot).
Opacity should not be set on li element, but rather like it's done in core themes:

.course-content ul li.section.hidden .sectionname > span, .course-content ul li.section.hidden .content > div, .course-content ul li.section.hidden .activity .activityinstance {
    opacity: 0.5;
}

Kind regards