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/dnd/InsertInLayoutUtil.java
{
		private Object[] items;
		private Object target;
		private int focusIndex = 0;
		public MultiItemsExpandRule( Object[] items, Object target )
		{
			this.items = items;
			this.target = target;
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.birt.report.designer.internal.ui.views.actions.InsertInLayoutAction.InsertInLayoutRule#canInsert()
		 */