Lucid "actions" icons is a small icon theme that contains the arrow/action icons from the Ubuntu 10.04 (Lucid Lynx) Humanity icon theme.
This theme can be applied on the current Ubuntu releases. To revert the changes reinstall the Humanity icon theme.
How to install?
· Right click on your desktop and select Change Desktop Background
· Click on the first tab: Theme
· Drag and drop the theme's archive in the Appearance Preferences window.
· If everything is OK, you will receive a confirmation message and you can activate the theme just by clicking on it.