permissions: allow billing.manage to view all billings

weblate/auth/permissions.py

@@ -452,7 +452,7 @@ def check_team_edit_users(user, permission, obj):
 @register_perm("billing.view")
 def check_billing_view(user, permission, obj):
     if hasattr(obj, "all_projects"):
-        if user.is_superuser or obj.owners.filter(pk=user.pk).exists():
+        if user.has_perm("billing.manage") or obj.owners.filter(pk=user.pk).exists():
             return True
         # This is a billing object
         return any(check_permission(user, permission, prj) for prj in obj.all_projects)