+ Bugs
  +
+ TO DO
  + Add default selection (Gaetan) see:
    https://wordpress.org/support/topic/code-manager-list/#post-16778000
+ Known issues
  + When previewer is disabled Firefox show a ns_error_failure if setting font on a canvas context
    See: https://bugzilla.mozilla.org/show_bug.cgi?id=941146
    This message can be safely ignored