This component allows the user to have two lists, and swap items between them.
Features:
Feel free to suggest enhancements or report bugs.
New Features
* Select all feature refactored, new style and customization
* User can now pass all displayed items to the other list
* Buttons now have a simpler style
* Empty list message can now be customized
Bugs
* Fixed a bug preventing the select all checkbox to show when search was disabled