Bug 122289 [Smoke][Regression][SPM-Linux WS]Item can't be dropped to layout from library
Details: Item can't be dropped to layout from library Setp: 1.New a library and insert a label 2.New a report design and use library 3.Drop label from library explorer to layout Actual results: Nothing is dropped into layout. Not only use library in outline, but also in library explorer is no effect. But when I drop the label without use library, it will use library and label can drop in it.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
* 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
	 * 
	 * @param string
	 *            the string to convert
	 * @return the string, or an empty string for null
	 */
	public static String convertToGUIString( String string )
	{
		if ( string == null )
		{
			string = "";