Make resolvedName the standard name to use across all music items.
Previously, the way Auxio differentiated between names in UIs was to
use name for normal items and resolvedName for parents. This was odd
and disjointed, as it muddled the meanings of the two fields and lead
to a lot of bugs. Fix this by making resolvedName *the* standard name
to use across all music items, even in ones that don't have to resolve
their name.