2beca14b8d
Scaling the icons all the way from/to 0 is a relatively big transition, which is fairly distracting when playing simultaneously for multiple previews after reaching the WINDOW_PICKER state. Instead, tie the scale to the overview state itself, so that the animations runs in parallel. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1654>