Hi @denispelli,
I’m not sure how to make the Name column wider, or get rid of the Last Commit column, but the file icon might help you distinguish .csv from .log.gz without having to mouse over the filename.
.csv files have an icon that looks like a piece of paper with 3 lines of writing on it.
.csv icon:
.log.gz files have an icon that looks like a piece of paper with a zipper running vertically down the center.
.log.gz icon: 
The difference is subtle, but I hope that helps a bit.
-shabkr