Bug 157744 [Regression]GUI has memory leak
Causes by 153732, designer has a regression to hold the report design handle in a hashmap. That causes the report design can not be released.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/schematic/editparts/TableEditPart.java
private void MergeContent( TableCellEditPart cellPart, List list )
			throws ContentException
	{
		CellHandle cellHandle = (CellHandle) cellPart.getModel( );
		int size = list.size( );
		for ( int i = 0; i < size; i++ )
		{
			CellHandle handle = (CellHandle) ( ( (TableCellEditPart) list.get( i ) ).getModel( ) );
			List chList = handle.getSlot( CellHandle.CONTENT_SLOT )
					.getContents( );
			for ( int j = 0; j < chList.size( ); j++ )
			{
				DesignElementHandle contentHandle = (DesignElementHandle) chList.get( j );
				handle.getSlot( CellHandle.CONTENT_SLOT ).move( contentHandle,
						cellHandle,
						CellHandle.CONTENT_SLOT );
			}
		}
	}
	/**
	 * not use?
	 * 
	 * @param list
	 */
	private void removeMergeList( ArrayList list )
	{
		int size = list.size( );
		for ( int i = 0; i < size; i++ )
		{