No, it's not related to Cauldron, so it should probably be in basic support, but for what it' worth:
I find it also rather annoying, because it just adds clutter to the menu and it's also not consistent.
For an easy workaround, you can just use a menu editor and put everything from "More" submenus one level up, that's what i'm doing.
If you want to change this properly, this is defined in our XDG menu definition: /etc/xdg/menus/applications.menu
To understand that, you may want to have a look at the freedesktop menu specification which this is implemented upon:
http://standards.freedesktop.org/menu-s ... atest.html