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
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		else if ( !oldPattern.equals( p ) )
		{
			return true;
		}
		return false;
	}
	/**
	 * Returns whether the page is modified.
	 * 
	 * @return Returns the isDirty.
	 */
	public boolean isDirty( )
	{
		return isDirty;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.swt.widgets.Control#setEnabled(boolean)
	 */
	public void setEnabled( boolean enabled )
	{
		super.setEnabled( enabled );
		setControlsEnabeld( enabled );
	}
	private void setDefaultPreviewText( String text )
	{
		if ( text == null || StringUtil.isBlank( text ) )
		{