Bug 146208 ActionBarContributor Enhancement
Use MultiPageEditorActionBarContributor instead of EditorActionBarContributor to support more multi-page feature.
UI/org.eclipse.birt.report.designer.ui.editors/src/org/eclipse/birt/report/designer/internal/ui/extension/FormPageDef.java
{
	private IConfigurationElement element;
	public String id;
	public String targetEditor;
	public String displayName;
	public String pageClass;
	public boolean visible = true;
	public String relative;
	public int position;
	public IAction pageAction;
	FormPageDef( IConfigurationElement element )
	{
		this.element = element;
		id = loadStringAttribute( element, ATTRIBUTE_ID );
		displayName = loadStringAttribute( element, ATTRIBUTE_DISPLAY_NAME );
		pageClass = loadStringAttribute( element, ATTRIBUTE_CLASS );
		visible = loadBooleanAttribute( element, ATTRIBUTE_VISIBLE );
		relative = loadStringAttribute( element, ATTRIBUTE_RELATIVE );
		position = loadPosition( element, ATTRIBUTE_POSITION );
		if ( loadStringAttribute( element, ATTRIBUTE_PAGE_ACTION ) != null )
		{
			pageAction = (IAction) loadClass( element, ATTRIBUTE_PAGE_ACTION );
		}
		if ( pageAction == null )
		{