Return the component that implements help text.
If a facet named helpText is found
that component is returned. Otherwise a HelpInline
component is returned. It is assigned the id
getId() + "_helpText"
If the facet is not defined then the returned HelpInline
component is re-intialized every time this method is called.
If getHelpeText returns null, null is returned.
a help text facet component |