A couple of bugs pertaining to soundtrack credits

There seems to be a couple of bugs relating to soundtrack credits. The first may just be an oversight.

First, if you go to a name page, you cannot edit soundtrack credits from there. This is quite inconvenient if you need to make a lot of changes, say like adding an alternate name (aka "as attribute").

The second is a bug. If you do a name merge and allow it to keep the previous name on the credit, this does not transfer over to soundtrack credits.