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
*         is <code>ErrorDetail</code>.
	 * @throws SemanticException
	 *             if layouts of slots are different.
	 */
	protected List insertColumnBand( int columnIndex, int insertFlag )
			throws SemanticException
	{
		boolean canDone = canInsert( columnIndex, insertFlag );
		if ( !canDone )
			throw new SemanticError( adapter.getElementHandle( ).getElement( ),
					new String[]{adapter.getElementHandle( ).getName( )},
					SemanticError.DESIGN_EXCEPTION_COLUMN_INSERT_FORBIDDEN );
		TableColumn column = new TableColumn( );
		adapter.getModule( ).getActivityStack( ).startTrans( );
		try
		{
			pasteColumn( column, targetColumnIndex, true );
			insertCells( targetColumnIndex );
		}
		catch ( SemanticException e )
		{
			adapter.getModule( ).getActivityStack( ).rollback( );
			throw e;
		}
		adapter.getModule( ).getActivityStack( ).commit( );
		return Collections.EMPTY_LIST;
	}
	/**
	 * Checks whether copied cells can be inserted and pasted.
	 *