I’m still naggin about this. Standardized look when devices, screen sizes and users are far away from standardized. But sure… if a 32” widescreen owner knows what is best choice for my iPad, then obviously personal options should remove.
My point is that right answer here isn’t pure coding per request. It is remainder that users aren’t for an admin, and all defaults must be changeable, bacuse users knows the best, not dev, designer or admin.
So the right answer is a solution where and admin can use visible sidebar, but users can toggle it if/when wanted so.