Bug 153387 Database item can't be dragged and dropped onto editor field
Steps to reproduce: 1.Start up BIRT in Mac OS X; 2.File->New->Project; 3.File->New->Report Design; 4.In Data Explorer, create a New Data Source, and choose "Classic Models Inc. Sample DataBase", press "Next" and then press "finish"; 5.In Data Explorer, create a New Data Set, press "Next"; 6.In the popup window, expand the "CLASSICMODELS", select and drag a item onto the editor field at right side.
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
ImageDescriptor.createFromFile( JdbcPlugin.class,
							"icons/data_source.gif" ) );
			reg.put( COLUMN_ICON,
					ImageDescriptor.createFromFile( JdbcPlugin.class,
							"icons/column.gif" ) );
		}
		catch ( Exception ex )
		{
			
		} 
	}
 
	/**
	 * constructor
	 * @param pageName
	 */
	public SQLDataSetEditorPage( String pageName )
	{
		super( pageName );
	}
	
	/*
	 * @see org.eclipse.datatools.connectivity.oda.design.ui.wizards.DataSetWizardPage#createPageCustomControl(org.eclipse.swt.widgets.Composite)
	 */
	public void createPageCustomControl( Composite parent )
	{
		setControl( createPageControl( parent ) );
		initializeControl( );
		
		Utility.setSystemHelp( getControl( ),