This example demonstrates how to utilize a helpful attribute
varContainerId.
It is a name of the variable which contains the prefix of the client Id within
pe:dynaFormControl.
This property allows to get the whole clientId of a component within
pe:dynaFormControl.
The whole client Id is sometimes required for JavaScript or
RequestContext.update(...).
Every input here has an icon to select a single value from a dialog.
The selected value will be set into the corresponding input field after a click on the button "OK".