I really dislike using tabs on per file basis, we dedicate the entire left side of the editor for file usage then we place tabs on top of the editor, just really feels unnatural to me.
I suggest using a section above the tree view for an “open/active” files area, much like how Chocolat does it.
Feel much more natural than:
I was told, and I’m sure it is possible, that this could be done with CSS, I just have no idea how I’d go about doing it. Either way, I think this should be a feature by default.