Bug 146208 ActionBarContributor Enhancement
Use MultiPageEditorActionBarContributor instead of EditorActionBarContributor to support more multi-page feature.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/DesignerActionBarContributor.java
List extensionPoints = ExtensionPointManager.getInstance( )
					.getExtendedElementPoints( );
			if ( !extensionPoints.isEmpty( ) )
			{
				insertElementActions = new RegisterActions[insertActions.length
						+ extensionPoints.size( )];
				for ( int i = 0; i < insertActions.length; i++ )
				{
					insertElementActions[i] = insertActions[i];
				}
				for ( int k = 0; k < extensionPoints.size( ); k++ )
				{
					ExtendedElementUIPoint point = (ExtendedElementUIPoint) extensionPoints.get( k );
					IElementDefn extension = DesignEngine.getMetaDataDictionary( )
							.getExtension( point.getExtensionName( ) );
					String displayName = new String( );
					displayName = extension.getDisplayName( );
					if ( displayName.equalsIgnoreCase( "Chart" ) ) 
					{
						displayName = "&" + displayName; 
					}
					RegisterActions extAction = new RegisterActions( extension.getName( ),
							displayName );
					insertElementActions[insertActions.length + k] = extAction;
				}
			}
		}
		return insertElementActions;
	}
	private void registerActions( RegisterActions[] actions )