GTK 2 Themes Not Supported in LL5

[Şerban S.]

[...]
"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. [...]

Hi, Jerry!
Thanks for the info!. Very useful!
Based on your suggestion, using Synaptic PM, I found the lib that takes care of the themes:

Code:

gtk3-engines-unico

Now, in order to fix this kind of problems, the solution we can use is to search with:
"GTK3 Replacement themes for  GTK2 ...[ThemeName]".
The problem with the themes is serious. It seems that LibreOffice for one, gives complicated results when messing with the themes. Broken tables, transparent selections and lots of other trouble related to the color schemes wich are governed by the themes, via system settings.
Here is an example: I had to replace the provided version with an older one, due to tables breaking in all documents. I found a version that works with the current settings, but when I make a selection, the selection flashes fast. It's usable though. I mentioned this as an example. I had also trouble with the File Manager, just as pointed in this thread, so some settings that work fine with LibreOffice, break the usability of the File Manager and so on.
I had the same trouble for years with Linux Mint, Ubuntu, Manjaro so the cause might be only XFCE related. Way too many coincidences to be Core OS related.
Far worse, when I tested Cinnamon and Mate, I ended up with the same trouble so it seems that the problems are more complex than a user can easily handle, even digging for articles (I do this...).
With KDE might be different, but I stopped using KDE since Mandriva 2009 and Mandriva One.
When I spoke about "Ecosystem" that is what I meant:
Linux Lite is more flexible, and I could find solutions easier than in the other distros.
In Romanian folklore is a tale about making cope together a goat, a cabbage and a wolf. It's very much the same here...
Trying to blend somehow lots of Apps under the same hood...