Allow excluding/including by more than just class, allow changing corner radius

[nikoraasu]

Hey, thanks for this amazing decoration! I really like it, because it allows me to have borders like in window managers that I am used to. It would be great if you could type in the things into include/exclude because there are some windows that just cannot be open at the same time as the settings (splash screen for example, i know the class, I just can't exclude it because it covers up the whole screen).

Also while playing around with including stuff, I realised that when you include "plasmashell" you get a beautiful effect of having borders on all the pop ups:

etc. The downside is that it of course appears on all windows that have the "plasmashell" class, so even the desktop has a border, which looks pretty goofy:

Is there a chance you could implement another way to pick windows to include/exlclude? Maybe by names? That way it'd be possible to customize which exact windows have an outline rather than every single window that matches a class.

Also, is it possible for you to add a configurable corner radius? I think it would be nice if we could modify it a little, I really want sharp corners.