adfcd45bff
In commit 1218e68 we allowed full-sized window previews under the assumption that we had enough other clues (like the vignette effect) to differentiate the overview from the regular session. That didn't hold up in testing, so make the maximum preview size slightly smaller again. https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3464 Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1525>