v2.0.0-beta.17

Added

• Add a flag allowing to exclude some courses from the search index and page
• Allow use of columns in footer menu items
• Use Limited CKEditor to edit section title

Changed

• Upgrade to DjangoCMS 3.8.0 (and subsequently to Django 3.1.2)
• Remove react-intl-po
• Rework front i18n workflow

Fixed

• Reinitialize JS after saving a modification in edit mode
• has_connected_lms crashed when course_run is blank
• Avoid stretching of footer menu items