display of essay question's textarea box is fixed with 'class' of 'span12'

[emilyac-TLS]

in the mod/icontent/locallib.php file, line:

$questionanswers .= html_writer::tag('textarea', null, array('name'=>$fieldname, 'class'=>'span12 answertextarea', 'required'=>'required'));
Change span12 to col-12
and get the answertextarea to be full width, and adaptable to browser width just like the notes textarea does (and has been doing as expected). Reference my Moodle Forum posting for screenshots.
https://moodle.org/mod/forum/discuss.php?d=406979