First let me thank you iGarikoitz for the great theme.
What you can see in the prints below is basically what some people here and elsewhere were asking if it was possible. Aura working with a standard system main menu and everything separated by system collections instead of individual game collections, with most things adjusting automatically using meta data xml lists and common folders. You can also notice in this mod different or extra media in the games panel, or buttons with extra information in the bottom to how the theme works in all the menus/pages, among other things.
Base used was Aura 1.0 beta v2 and inspiration from some recent WIP iGarikoitz prints. RetroFE core version is 0.9.0
I have more prints and video, but forum limits number of attachments. Since everyone knows how this theme originally works there's no surprise in saying that this was a hard modification to accomplish. Even more if we think about LaunchBox Big Box port and others having some issues with this kind of structure.
Still, this is ongoing work in progress, polishing stuff, finding the better code solution for each system because box art or flyers dimensions can change dramatically like Dreamcast, SNES and others. I'm missing some features here that other frontends have but that is a talk for other time. Cheers.