I would like to see a file icons in the file tree, based on file extension (.rb, .html) or even file name (Gemfile).
For example, in a rails project the file tree gets rather large, if ruby files could have ruby shaped file icons, and .erb.html files have a different and easily recognisable icon then it would make skimming the project structure to find a particular controller or view much easier.
I would also like to extend icons to files without extensions such as Gemfile or Procfile as these are also significant.