Bug 171501 When click the data set or data source, the focus is lost[0001]
Description: When click the data set or data source, the focus is lost[0001] Build number: 2.2.0.v20070124-0630 Steps to reproduce: 1, New a Sample datasource and data set 2, Click the data source or data set in Data Explorer 3, Press 'Delete' button on keyboard Expected result: The datasource or data set can be deleted successfully Actual result: The operation take no effect, and the datasource is gray. When choose the datasource again, the datasource is able to delete Error log:
UI/org.eclipse.birt.report.designer.ui.views/src/org/eclipse/birt/report/designer/ui/views/data/DataView.java
{
	/**
	 * the ID
	 */
	public static final String ID = "org.eclipse.birt.report.designer.ui.views.data.DataView"; 
	private String defaultText = Messages.getString( "DataView.defaultText.noDataView" ); 
	/**
	 * default constructor
	 */
	public DataView( )
	{
		super( );
	}
	/**
	 * Creates and returns the default page for this view.
	 * 
	 * @param book
	 *            the pagebook control
	 * @return the default page
	 */
	protected IPage createDefaultPage( PageBook book )
	{
		MessagePage page = new MessagePage( );
		initPage( page );
		page.createControl( book );
		page.setMessage( defaultText );
		return page;