Hi Jon, your solution to removing Preferences is very clever and cool. I never thought that one could do this via CSS.
This makes me wonder if I could remove the "Course Index" from Moodle 4.0 using the same technique. Chris removes it in his LearnR theme. I am not sure how.
Do you have anything thoughts about how to remove the "Course Index" feature, meaning the entire left-side flyout column, from Moodle 4.0? Thanks.
Quick Update: In my quick experimenting, I came up with the following CSS, which hides the button. Logic: If the button is never available, there is no way for the student to see the Course Index. I put this CSS into the Raw SCSS textbox for Boost.
.drawer-toggles .drawer-left-toggle .btn {
display: none;
}