Stable release v3.11-r7

Features

• Issue #183: Metadata fields can be explained by a description
• Issue #187: The visibility can be configured on upload
• PR #249: mod_opencast activities are now cleaned up after manual video import (analog to LTI activities)
• The block can now be added on the dashboard page. There it shows an overview of all series and videos the user has access to.
• The owner of a video can be specified by an ACL role. This role allows us to display videos on the overview page that are not included in moodle.

Bug Fixes

• Issue: #239