MDL-36017 Fields numsections, hiddensections and coursedisplay are now format-specific options

- Fields added to format_legacy as default course format options;
- Upgrade script copies fields values from table course to course_format_options;
- Fields removed from table course;
- Fields removed from edit course form;
- Since front-page course has a 'numsections' setting, format_site defines it as it's option;
- Removed accessing those fields in core code unless we know that format supports them and in this
  case instead of $course = $DB->get_record('course'); we use:
  $course = course_get_format($courseorid)->get_course(); This way all format-specific options
  are added to the $course object

course/format/weeks/format.php

@@ -38,6 +38,7 @@ if ($week = optional_param('week', 0, PARAM_INT)) {
 // End backwards-compatible aliasing..
 
 // make sure all sections are created
+$course = course_get_format($course)->get_course();
 course_create_sections_if_missing($course, range(0, $course->numsections));
 
 $renderer = $PAGE->get_renderer('format_weeks');