This is something that's incredibly helpful, and as I understand, is currently not possible to implement because there's no sidebar API.
Other IDE's (such as PyCharm or Atom Text) have a feature where files will change color according to their status on git\svn. Atom obviously only supports GIT, but PyCharm (and all of IntelliJ products) will work for SVN as well. It's a terribly useful feature - if a file has been modified it is colored blue, if there's an unversioned file it's red, etc. etc. It makes managing a project a lot more easier
If you don't understand what I mean, here's a screenshot (look at the left panel):
Will it ever be possible with Sublime?
Thank you all in advanced