A menu editor would help, but since editing a few text files is simple enough (Provided itr is documented ), and might even be of more use to a user of LXDE style desktop
It might not be all that necessary, although considering Mint/Ubuntu et all attempts to GUIFy all and provide that infamous help to new users, that they think they must need, it is a little more than surprising that they don't automatically look for ways of simplifying the user experience
Sometimes known as dumbing it down..
--whether it is via a simplified package manager or Gnome's penchant for removing customization options from their dialogs..http://ubuntuforums.org/showthread.php?t=896355post 4..https://wiki.archlinux.org/index.php/LXDE
Tips and tricks
Application Menu Editing
The application menu works by resolving the .desktop files located in /usr/share/applications. Many desktop environments run programs that supersede these settings to allow customization of the menu. LXDE has yet to create an application menu editor but you can manually build them yourself if you are so inclined. Third party menu editor can be found in AUR - lxmed
To add or edit a menu item, create or link to the .desktop file in /usr/share/applications.