Fix Gtk3 deprecations
Now that the port is merged, we should fix deprecation.
Currently we are set to Gtk 3.8.
This is a progressive work.
Build without deprecation with the following versions of Gtk:
-
3.10 -
3.12 -
3.14 -
3.16 -
3.18 -
3.20 -
3.22 -
3.24
This will help longer term for Gtk4.