Collapse/Expand Icons Incorrect

[BobWag12]

Updated to Moodle 4.5 and the category Collapse/Expand Icons for this plugin are no longer the nice small arrow. They now now oversized black arrows and look terrible. Aside from that, the plugin still appears to work with no issues. I tried to modify the Collapse/Expand Icon myself, but do not understand where it is defined for this plugin. If some when can tell me, perhaps I can correct this?