Bug 151960 Library element popup menu display is wrong.
1:Creat a libray, add a table to this libray. 2:public this library. 3:Creat a report design. 4:Open the library explore, drag the table to the layout editor. 5:Select the table row, copy the selection row. 6:Select other row, clik the right button of the mouse to popup the menu . The result:Paste action and insert copied column action is highlight.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ColumnBandInsertAction.java
* @throws SemanticException
	 *             if any error occurs during pasting cells.
	 */
	private void insertCells( int columnIndex ) throws SemanticException
	{
		int slotCount = adapter.getElementHandle( ).getDefn( ).getSlotCount( );
		
		for ( int i = 0; i < slotCount; i++ )
		{
			SlotHandle slot = adapter.getElementHandle( ).getSlot( i );
			for ( int j = 0; j < slot.getCount( ); j++ )
			{
				DesignElementHandle content = slot.get( j );
				if ( content instanceof RowHandle )
				{
					insertCell( (RowHandle) content, columnIndex );
				}
				if ( content instanceof GroupHandle )
				{
					insertCellsInGroup( (GroupHandle) content, columnIndex );
				}
			}
		}
	}
	/**
	 * Inserts a new cell to the given column position of the given row.
	 * 
	 * @param row
	 *            the table row
	 * @param columnIndex