adw-gtk3 VS mutter-rounded

Use this theme

As far as I know it doesn't exist yet... but most likely Evince will be ported in the future. But while that doesn't happen, what you can do is use the adw-gtk3 theme (https://github.com/lassekongo83/adw-gtk3) for legacy applications to combine with applications that are already ported to libadwaita

Why not use the adw-gtk theme for gnome to make all the deco's match rather than use Adwaita-Dark?

Application Theme : adw-gtk-3 with Gradience

You can use the adw gtk3 theme. https://github.com/lassekongo83/adw-gtk3

GTK theme: adw-gtk3

That's because i use this KvLibadwaita and adw-gtk3 themes to have everything looking the same on Gnome :>

Just found a workaround for the issue until an update fixes the issue for Fedora 28 - Alt+F2, type "r" to restart Gnome Shell. More info: https://github.com/lassekongo83/adw-gtk3/issues/213

I believe that adw-gtk3 could still be beneficial in ensuring a uniform appearance across both GTK3 and GTK4 applications. The more solutions we can offer to users, the greater the likelihood of achieving the desired outcome.

Everything you need is under the install section

For rounded corners I've used Mutter Rounded which is basically a patched Mutter (Gnomes window manager)

Since OP doesn't answer I simply googled it and it seems like OP uses this project: https://github.com/yilozt/mutter-rounded

Good question. The dev himself has said he does use a certain patch in his build. See here.. However, I went inside the code and it appears that he first downloads the Mutter source from RPM (which does not have the performance patches, yet), builds a big "meta"-patch out of everything in the "patches" folder, and applies those changes on the downloaded mutter build. So to be safe, I downloaded 1877 and 2487 manually, and edited package.sh myself. Gnome runs significantly faster, with fewer dropped frames, especially in the overview and app menu. (1877 gave me a few quirks though so you might want to skip that.)