Add "recently added" as a sorting option.

[officialnochill]

Is your feature request related to a problem? Please describe.

Having the option to see your most recently added songs would be very convenient for people who like to listen to music recently downloaded / added.

[Taiko2k]

Under the "More..." column sub-menu, either "Internal track ID" or "File Changed" should allow you to effectively sort by most recently added.