I've been trying to minimise the footprint of an Xfce-4.10 Raspbian system which will be used as a Chromium kiosk. As part of this, I had previously removed packages related to GTK, Xfce themes, plymouth-themes etc.
At some point, my GTK apps stopped properly rendering GTK widgets (example). Notice the Xfce Session and Startup window renders fine, whereas the NetworkManager/GTK menu has no spacing or dividers.
A similar issue is encountered viewing Onboard settings. Checkboxes are not visible, although pressing where they should be shows a tick. Tabs are only visible by their text and function properly as tabs.
What steps can I take to reinstall/reconfigure GTK? There are no GTK-related settings in
~/.config, I have reinstalled all base xfce4 packages and
gtk3-engines-xfce, as well as reinstalling
adwaita-icon-theme and switching themes in Appearance Settings.