"Sounds" expansion; filtering & varied alert sounds.

[Hubcapp]

Currently, there are a couple of settings related to sounds in the client.

1. The built in "On" and "Off" setting in the wrench menu. These disable or enable all sounds and it is only available while on a P2P world.
2. "Enable notification sounds" under the notifications tab

I would like to add these settings:

1. The ability to toggle playing each specific sound. Some sounds, I would like to always hear, like the leveling up sound. But I can't usually hear that sound, because I must toggle sounds off for my sanity while fishing or other activities that spam an annoying sound.
2. More notifications should exist, and we can have custom sounds for each notification type. Currently there is just one notification sound for all notification types. I would like to add an "inventory full" notification (in addition to the existing giant red flashing text overlay), and it could have its own sound. :-)
3. Area specific music #71, area specific music