fix #607 PageEngine containerId can't be BODY
fix #604 Aria disappeared from APIdocs
fix #611 Error when tab selection triggers refresh

When tab selection triggers a refresh of the seciton containing the @aria:Tab widget, an error is raised when trying to give focus to the widget, which has been destroyed in the mean time.
fix #601 Tooltip on aria:Icon widget

A delegate id is now added to the markup generated by the Icon widget, so that listeners to mouse events are correctloy called.

Close #601
fix #600 general.disable was not checked in aria.templates.LegacyGeneralStyle,

before using it.
fix #617 InputValidationHandler issue

A javascript error was raised in the following use case:
inside a container having scrollbars, a field is in error,
the field is focused (so that the error tooltip is open),
scroll the container with the mouse wheel.