Bug 120216 Group dialog should be showed even dataset is not set.
- Add a table report item - do not set the data set - try creating a new table group. - An error is shown Expected behavior - As part of the template requirements, we dont want UI to do the validation. User should be able to go and define a group, even if the dataset is not defined.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
* @return the layout created
	 */
	public static GridLayout createGridLayoutWithoutMargin( )
	{
		GridLayout layout = new GridLayout( );
		layout.marginHeight = layout.marginWidth = 0;
		return layout;
	}
	/**
	 * Creates a new grid layout without margins with given the number of
	 * columns, and whether or not the columns should be forced to have the same
	 * width
	 * 
	 * @param numsColumn
	 *            the number of columns in the grid
	 * @param makeColumnsEqualWidth
	 *            whether or not the columns will have equal width
	 * 
	 * @return the layout created
	 */
	public static GridLayout createGridLayoutWithoutMargin( int numsColumn,
			boolean makeColumnsEqualWidth )
	{
		GridLayout layout = new GridLayout( numsColumn, makeColumnsEqualWidth );
		layout.marginHeight = layout.marginWidth = 0;
		return layout;
	}
	/**
	 * Convert the give string to GUI style, which cannot be null
	 *