Bug 175803 format date time examples are incorrect
1. put a data field on report 2. select "format date time" in "properties" 3. select "custom" 4. in the examples in the "example formats" table are not correct if you use non english date/time settings in your microsoft windows preferences; e.g. "Short Date" is shown as "28.02.07" with "example code" "M/dd/yyyy", the correct value had to be "dd.MM.yyyy"
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/FormatDateTimePage.java
* 
	 * @param dirty
	 */
	private void markDirty( boolean dirty )
	{
		isDirty = dirty;
	}
	private String validatedFmtStr( String fmtStr )
	{
		String text = fmtStr;
		if ( text == null )
		{
			text = PREVIEW_TEXT_INVALID_FORMAT_CODE;
		}
		return text;
	}
	/**
	 * Updates the format Pattern String, and Preview.
	 */
	private void updatePreview( )
	{
		markDirty( hasLoaded );
		String category = getCategory4UIDisplayName( typeChoicer.getText( ) );
		setCategory( category );
		Date sampleDateTime = defaultDate;
		if ( getPreviewText( ) != null
				&& !getPreviewText( ).equals( defaultDateTime ) )
		{
			try
			{