redesigned RadioPanel - replaced by common class SelectPanel (including
xml elements)
redesigned RadioButton - extends common class SelectButton
new CheckBox - extends common class SelectButton
SelectPanel has a MultiSelect property, if true then panel contains
check boxes
If SelectPanel does not have a Click handler, default one is appended to
save component data.
SelectPanel can have a new Empty validator
ProcessManager does slide cleaning on FinishEvent processing.
SlideManager stops timers (without close event firing) and closes
windows (removes close listeners first).