
_updateIconSizes() was assuming that the icon is the only content of an item when scaling the icon size to ensure the item size matches _fixedHItemSize/_fixedVItemSize. However the icon may have padding and there might be a label and spacing between the icon and the label. This resulted in items being larger than their slots. Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2234