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
}
			if ( part.getRowNumber( ) <= rightTopPart.getRowNumber( )
					&& part.getColumnNumber( ) + part.getColSpan( ) - 1 >= leftTopPart.getColumnNumber( ) )
			{
				rightTopPart = part;
			}
			if ( part.getColumnNumber( ) <= leftBottomPart.getColumnNumber( )
					&& part.getRowNumber( ) + part.getRowSpan( ) - 1 >= leftBottomPart.getRowNumber( ) )
			{
				leftBottomPart = part;
			}
			if ( part.getRowNumber( ) + part.getRowSpan( ) - 1 >= rightBottomPart.getRowNumber( )
					&& part.getColumnNumber( ) + part.getColSpan( ) - 1 >= rightBottomPart.getColumnNumber( ) )
			{
				rightBottomPart = part;
			}
		}
		return new TableCellEditPart[]{
				leftTopPart, rightTopPart, leftBottomPart, rightBottomPart
		};
	}
	/**
	 * Returns the layer indicated by the key. Searches all layered panes.
	 * 
	 * @see LayerManager#getLayer(Object)
	 */
	public IFigure getLayer( Object key )
	{
		if ( innerLayers == null )
			return null;