GTK 2 Themes Not Supported in LL5

[Valtam]

Source - https://simon.shimmerproject.org/2019/07...-released/

"In theory distributions can decide to disable Gtk+2 already. However there are still some applications that rely on the libraries that are not yet ported to Gtk+3 (see the Roadmap page, e.g. Ristretto) so those would be broken by that change.

As soon as we have stable releases of all applications in a Gtk+3 version we will probably remove Gtk+2 support altogether.
For the panel we will at least disable Gtk+2 support by default upstream as there are only very few unported plugins."

I see some of our gtk2 packages that are installed, are still relied on as deps. I'm sure gtk2 will be completely gone without any of these issues by 22.04
Removing gtk2-engines didn't seem to do any harm, taking with it a number of the now defunct gtk2 themes.