Use the icon "system-log-out-symbolic" instead of "application-exit-symbolic" for the logout system action
According to this line, gnome-shell uses the "wrong icon" for the logout action.
adwaita-icon-theme already has a dedicated icon for logout "system-log-out-symbolic".
Changing the icon to "system-log-out-symbolic" has no visual change in a default GNOME setup since both "system-log-out-symbolic" and "application-exit-symbolic" are the same in adwaita-icon-theme, however, other icon themes differentiate between the two icons so pointing to the appropriate icon name is the right thing here.
Note: please also backport a fix to 3.36 as it has no visual regression because "system-log-out-symbolic" has already been in adwaita-icon-theme since 2018.
Edited by Amr Ibrahim