This change technically happened back in September with the release of GNOME 3.18. You could make the claim that it took far longer than 3 years, you could say it took 16 years to get this functionality, and I personally have been waiting for this since I first started using GNOME back in 2006 with Fedora Core 6. Also, the "Rename" and "Move to Trash" options aren't available in the "Open File" dialog, but in retrospect that's not really necessary.