MDL-82351 courseformat: allow blocks to use the course editor

Some formats like the social need the blocks and drawers to access the
course editor. However, the include_course_ajax was called after the
main page structure is created and produces some errors, especially in
behat. Now include_course_ajax is called before the page header.

course/view.php

@@ -304,6 +304,20 @@
 }
 
 $PAGE->set_heading($course->fullname);
+
+// Get information about course modules and existing module types.
+// format.php in course formats may rely on presence of these variables.
+$modinfo = get_fast_modinfo($course);
+$modnames = get_module_types_names();
+$modnamesplural = get_module_types_names(true);
+$modnamesused = $modinfo->get_used_module_names();
+$mods = $modinfo->get_cms();
+$sections = $modinfo->get_section_info_all();
+
+// Include course AJAX. This should be done before starting the UI
+// to allow page header, blocks, or drawers use the course editor.
+include_course_ajax($course, $modnamesused);
+
 echo $OUTPUT->header();
 
 // Show communication room status notification.
@@ -327,23 +341,11 @@
 // Make sure that section 0 exists (this function will create one if it is missing).
 course_create_sections_if_missing($course, 0);
 
-// Get information about course modules and existing module types.
-// format.php in course formats may rely on presence of these variables.
-$modinfo = get_fast_modinfo($course);
-$modnames = get_module_types_names();
-$modnamesplural = get_module_types_names(true);
-$modnamesused = $modinfo->get_used_module_names();
-$mods = $modinfo->get_cms();
-$sections = $modinfo->get_section_info_all();
-
 // CAUTION, hacky fundamental variable defintion to follow!
 // Note that because of the way course fromats are constructed though
 // inclusion we pass parameters around this way.
 $displaysection = $section;
 
-// Include course AJAX.
-include_course_ajax($course, $modnamesused);
-
 // Include the actual course format.
 require($CFG->dirroot .'/course/format/'. $course->format .'/format.php');
 // Content wrapper end.