Bug 5571 JAR Packager: Reveal first checked project
If the list of projects in the JAR Packager is long it is possible that the shown projects are not checked even though there are checked projects (due to current selection). ==> reveal the first checked project.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/jarpackager/JarPackageWizardPage.java
private final static int SIZING_SELECTION_WIDGET_WIDTH= 400;
	private final static int SIZING_SELECTION_WIDGET_HEIGHT= 150;
	
	/**
	 *	Create an instance of this class
	 */
	public JarPackageWizardPage(JarPackage jarPackage, IStructuredSelection selection) {
		super(PAGE_NAME, selection);
		setTitle(JarPackagerMessages.getString("JarPackageWizardPage.title")); 
		setDescription(JarPackagerMessages.getString("JarPackageWizardPage.description")); 
		fJarPackage= jarPackage;
		fInitialSelection= selection;
	}
	/*
	 * Method declared on IDialogPage.
	 */
	public void createControl(Composite parent) {
		
		initializeDialogUnits(parent);
		
		Composite composite= new Composite(parent, SWT.NULL);
		composite.setLayout(new GridLayout());
		composite.setLayoutData(
			new GridData(GridData.VERTICAL_ALIGN_FILL | GridData.HORIZONTAL_ALIGN_FILL));
		createPlainLabel(composite, JarPackagerMessages.getString("JarPackageWizardPage.whatToExport.label")); 
		createInputGroup(composite);
		createExportTypeGroup(composite);
		new Label(composite, SWT.NONE); 
		createPlainLabel(composite, JarPackagerMessages.getString("JarPackageWizardPage.whereToExport.label")); 
		createDestinationGroup(composite);