Sidebar not visible when transitioning from mobile to desktop viewport

When expanding the viewport's width from a mobile size to a desktop one, a blank space slides in from the left, but the super sidebar itself stays invisible.

ghost

This might be due to 8d973959 where we apply the gl-visibility-hidden util on the super sidebar in some condition. However, it doesn't look like the condition ever reacts to the viewport being resized, meaning that if the class is applied once, it won't be removed unless the page is refreshed.