marinaglancy/moodle-format_flexsections — pull request #2 by gerryghall (2014-02-22 22:17:50+00:00)
Title: Moodle  has a style class .hide which is set to display: none

and a overriding rule for the hide icon icon.hide display:in-line
I have duplicated this so the hide/show action displays when the section is not hidden