gtk-key-theme Emacs has no effect in 22.10

[Rovanion]

Setting the key binding theme for GTK to Emacs through the usual method of running

```
gsettings set org.gnome.desktop.interface gtk-key-theme Emacs
```

has no effect. Opening Nautilus, typing a word, and then pressing ctrl-a will select the whole word instead of moving the caret to the beginning of the line. The same behaviour can be observed in other GTK inputs such as the search field of Gnome Shell.

```
└$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.10
Release: 22.10
Codename: kinetic

└$ gnome-shell --version
GNOME Shell 43.1
```