Minor DAM actions widget need to be wrapped in container widgets to be consistent with tab design in Studio.
Container widgets need a new "ajaxPanelId" property that will make it possible for other widgets/actions to reference it.
In DAM, the container widgets will et CSS classes and a4j:outputPanel ID for all three main areas.
Also the actions need to handle reRender and eventsQueue properties, as well as the content view widget used in the center main area of DAM. They should also rerender themselves by default (otherwise the 'lock/unlock' icon is not refreshed, for instance)
