Bug 180645 Support set format for Date/Time type parameter.[0705]
Description: Support set format for Date/Time type parameter. Build number:2.2.0.v200704031345 Steps to reproduce: 1. New a Date report parameter. 2. Click Change... button to set format for it. Expected result: Can set format for Date/Time parameter. Actual result: Change... button is disabled. Error log:N/A
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/FormatDateTimePage.java
*/
	private Composite getGeneralPage( Composite parent )
	{
		if ( generalPage == null )
		{
			generalPage = new Composite( parent, SWT.NULL );
			GridLayout layout = new GridLayout( 1, false );
			layout.marginHeight = 0;
			generalPage.setLayout( layout );
			generalPreviewLabel = createGeneralPreviewPart( generalPage );
		}
		return generalPage;
	}
	/**
	 * Lazily creates the custom page and returns it.
	 * 
	 * @param parent
	 *            Parent contains this page.
	 * @return The custom page.
	 */
	private Composite getCustomPage( Composite parent )
	{
		if ( customPage == null )
		{
			customPage = new Composite( parent, SWT.NULL );
			customPage.setLayout( createGridLayout4Page( ) );
			createCustomSettingsPart( customPage );
			if ( pageAlignment == PAGE_ALIGN_VIRTICAL )
			{
				Composite container = new Composite( customPage, SWT.NONE );