ef777426d2
Since commit 0f1b566918e, we use gjs' automatic getters/setters for the shader properties. Those handle the properties on the JS and GObject side, but they don't update the corresponding uniform, whoops. Revert the lightbox bits of commit 0f1b566918 to get the effect back. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1712>