Provide enhanced add_course_form for managers, too

[Dagefoerde]

moodle-block_evasys_sync/classes/add_course_form.php

Line 59 in ef1e972

if (!is_siteadmin()) {

provides an enhanced list of courses, offering all courses owned by anyone with editing capabilities.

Certain users in our institution have the manager role and manage courses for the lecturers that they are associated with. They also need this enhanced view.