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/ColumnBandAdapter.java
if ( columnToInsert == cellPos )
				return insert ? ( i + 1 ) : i;
			
			
			else if ( columnToInsert < cellPos )
				return i;
		}
		
		return -1;
	}
	/**
	 * Returns the cell resides in the row.
	 * 
	 * @param row
	 *            the row handle
	 * @param columnToInsert
	 *            the column number to insert, count from 1
	 * @param insert
	 *            whether insert mode
	 * @return the cell in the given position
	 */
	protected CellHandle findCell( RowHandle row, int columnToInsert )
	{
		SlotHandle cells = row.getCells( );
		for ( int i = 0; i < cells.getCount( ); i++ )
		{
			CellHandle cell = (CellHandle) cells.get( i );
			int cellPos = getCellPosition( cell );