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
*	to import from
	 */
	protected void handleDestinationBrowseButtonPressed() {
		FileDialog dialog= new FileDialog(getContainer().getShell(), SWT.SAVE);
		dialog.setFilterExtensions(new String[] {"*.jar"}); 
		String currentSourceString= getDestinationValue();
		int lastSeparatorIndex= currentSourceString.lastIndexOf(File.separator);
		if (lastSeparatorIndex != -1) {
			dialog.setFilterPath(currentSourceString.substring(0, lastSeparatorIndex));
			dialog.setFileName(currentSourceString.substring(lastSeparatorIndex + 1, currentSourceString.length()));
		}
		else
			dialog.setFileName(currentSourceString);
		String selectedFileName= dialog.open();
		if (selectedFileName != null) {
			IPath path= getPathFromString(selectedFileName);
			if (path.lastSegment().equals(getOutputSuffix()))
				selectedFileName= ""; 
			fDestinationNamesCombo.setText(selectedFileName);
		}
	}
	/**
	 * Returns the resource for the specified path.
	 *
	 * @param path	the path for which the resource should be returned
	 * @return the resource specified by the path or <code>null</code>
	 */
	protected IResource findResource(IPath path) {
		IWorkspace workspace= JavaPlugin.getWorkspace();
		IStatus result= workspace.validatePath(