fix(sfx): Reload effect files when applying

[poweredbypie]

This has been tested on Windows only.
To recreate the bug on 1.9.0:

• Create a texture pack with explode_11.ogg as something different (you can just copy endStart02 and rename it, or something like that)
• Apply the pack
• Kill an icon on the home screen
• The default explode_11.ogg will play rather than the replaced one

This fixes the issue by forcing GD to reload the effect. Prior to this the effect was cached in a map, so it wouldn't recognize any changes during a reload.

[poweredbypie]

Ok I just tested this a bit further and for some reason it only works one way (if you already have a pack applied it works, but if you're coming from the default and applying another pack it doesn't) so investigating that now

[poweredbypie]

I was iterating the sounds map wrong and skipping half of them so that's fixed now. Looks to be fully functioning from what I can tell