Bug 169393 Outline switch action isn't disappear after double clicking the Matser Page element on report outline
Open a report design, and active the improved XML editor, double click the master page element on report outline. Then, it will switch to the MasterPage editor, and the outline switch action isn't disappear on toolbar menu on outline view.
UI/org.eclipse.birt.report.designer.ui.editors/src/org/eclipse/birt/report/designer/ui/editors/MultiPageReportEditor.java
public IEditorPart getEditorPart( )
	{
		return this;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.designer.internal.ui.editors.parts.GraphicalEditorWithFlyoutPalette#performRequest(org.eclipse.birt.report.designer.core.util.mediator.request.ReportRequest)
	 */
	public void performRequest( ReportRequest request )
	{
		if ( ReportRequest.OPEN_EDITOR.equals( request.getType( ) )
				&& ( request.getSelectionModelList( ).size( ) == 1 )
				&& request.getSelectionModelList( ).get( 0 ) instanceof MasterPageHandle )
		{
			handleOpenMasterPage( request );
			return;
		}
		
	}
	/**
	 * @param request
	 */
	protected void handleOpenMasterPage( final ReportRequest request )
	{
		if ( this.getContainer( ).isVisible( ) )
		{
			setActivePage( LayoutMasterPage_ID );
			Display.getCurrent( ).asyncExec( new Runnable( ) {
				public void run( )