Bug#1024535: 'GtkSettings' has no property named 'gtk-overlay-scrolling'

[Ángel]

Package: libwebkit2gtk-4.0-37
Version: 2.38.2-1~deb10u1
Severity: minor

After the recent update of webkit2gtk in buster-security, running
evolution, geary, devhelp (or any other program using wbkit2gtk, i
guess) from a console it is continuously filled by lines like 

(WebKitWebProcess:<pid>): GLib-GObject-WARNING **: <time>:
g_object_get_is_valid_property: object class 'GtkSettings' has no
property named 'gtk-overlay-scrolling'

when using a WebKit area, i.e. whenever viewing or writing an email or
doing a mouse over, thus all the time.

The warning is coming from GLib, but due to WebKitWebProcess requesting
a property not in the GtkSettings version in the system:

https://docs.gtk.org/gtk3/property.Settings.gtk-overlay-scrolling.html
lists this property as added in gtk-3 3.24.9, but buster includes 3.24.5

This may seem nitpicky, but it effectively makes that console unusable.

Regards