I always shudder a bit when people describe something as "cool" because usually it's a glitzy hot and trendy mess.

Whilst I don't use webstorm -- it's too fat, bloated, and filled with crap I'd normally turn off/disable -- I could see something like this being semi-useful in editors where you have that side tree. Something I also don't use because I know how to organize folders.

That said, don't forget to add your media target to your link. :D After all any time you see a <link rel=stylesheet> lacking media="" with something like screen, or set to media="all", you're likely looking at developer ignorance, incompetence, and ineptitude.

See 99.99% of the garbage vomited up by front-end frameworks.