ea51a7c657
We're calculating icon sizes for the alt tab switcher early and at a point where the style attributes of this._list are not loaded yet. To make sure the value of this._list.spacing is correct, call ensure_style() on this._list before accessing the spacing. https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/587 (cherry picked from commit eab320dab59e702cda3d2864be2bb59c03d34d79)