Allow us to customize server, notification, dm and mention sounds.

Probably one of the most requested features of discord I've seen since I've started using it. Allow the user to customize all sounds within discord. Having the same sound for DM's, Notifications, Mentions and Server Announcements is quite frustrating when trying to pinpoint what type of ping it is. Just give us a default of 20 sounds to choose from or allow us to add our own sounds, and apply it to all 4 of the topics post notifications. Thank you!