b4797956c7
Since commit 520cea93941b, the opacity of icon grid children is used both to skip children outside the current viewport and to hide the real icons while animating icon clones. As a result, a grid animation during an animation now ends up showing the icons that are being animated. Avoid that glitch by leaving children's opacity alone when there's an ongoing animation. https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/582