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
* @param cells
	 *            cloned cells
	 * @return <code>true</code> if the row count matches the count of
	 *         "rowSpans" in <code>cells</code>, otherwise <code>false</code>.
	 * 
	 */
	private boolean isValidInsertAndPasteArea( List cells )
	{
		int numOfRows = adapter.getRowCount( );
		int rowCount = 0;
		for ( int i = 0; i < cells.size( ); i++ )
		{
			CellContextInfo contextInfo = (CellContextInfo) cells.get( i );
			rowCount += contextInfo.getRowSpan( );
		}
		if ( rowCount < numOfRows )
			return false;
		return true;
	}
	/**
	 * Inserts a new column band to the table/grid. If has a cell with colSpan >
	 * 1 at the insert position, increases the colSpan.
	 * 
	 * @param originalCells
	 *            a list containing cells that is to be deleted.
	 * @param columnIndex
	 *            the column index where copied cells are pasted
	 * @param isInsert
	 *            <code>true</code> if this is an insert and paste action.
	 *            Otherwise <code>false</code>.