Bug 119331 Library - name space terminology and behavior
During BIRT 2.0 library feature review meeting the following change was decided. - Change the term namespace to 'prefix' - By default use the library name as the prefix ( namespace ); the dialog to input prefix should be prompted only if hte auto generated prefix is not unique.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
* @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 = ""; 
		}
		return string;
	}
	/**