Unity-Launcher-Editor is a GUI designed to manage Unity Launcher items and quicklists. So far, it supports add/remove Launcher items, customize quicklist group, and even change shortcut icons.
This project is hosted on, and still in the early development phase.
To install unity-launcher-editor, first open up a terminal window and type in this two commands:
sudo apt-get install bzr bzr branch lp:unity-launcher-editor
After that, run the command to start the GUI:
unity-launcher-editor on launchpad.net: