Pick List component is a simple selection component where a set of items can be
selected from a list that contains all the available items and moved to a list that
contains the selected items.
The next example shows the simplest declarative definition on the page.
Pick List is a simplified variant of ListShuttle component. It does not use a custom model.
It uses f:selectItem(s) tags for elements definition instead, so converters creation
isn't required for the component.
Value of the component is stored as a list, which contains select items values.
The following example shows a simple case where the values are applied and listed via Ajax.
The select items in this example contain USA state names as a label for an item and the
corresponding state capitals as a value for an item.
Just move some elements with state names to the result list and the corresponding
state capitals will appear in the result panel.