Merge remote-tracking branch 'studip/5.0' into 5.0

.gitlab-ci.yml

ChangeLog

VERSION

app/controllers/admin/loginstyle.php

app/controllers/course/ilias_interface.php

app/controllers/resources/room_request.php

app/controllers/room_management/overview.php

app/routes/Blubber.php

app/views/admin/course_wizard_steps/index.php

app/views/admin/ilias_interface/index.php

app/views/admin/lti/index.php

app/views/admin/specification/index.php

app/views/contact/index.php

app/views/course/ilias_interface/add_object.php

app/views/course/ilias_interface/index.php

app/views/course/ilias_interface/view_object.php

app/views/course/lti/index.php

app/views/course/members/accepted_list.php

app/views/course/members/add_dozent.php

app/views/course/members/add_member.php