Commented Unassigned: Bubble Chart Series being converted as ChartSeries instead of BubbleChartSeries [15378]

When opening a workbook created in Excel that includes a bubble chart, the chart gets represented as an ExcelBubbleChart object that has ExcelChartSeries series instead of ExcelBubbleChartSeries series, which makes updating the bubble size challenging.

When opening a workbook that includes a bubble chart, the chart series should be created as an ExcelBubbleChartSeries where possible (instead of ExcelChartSeries).

Comments: Fixed in changeset 31e4b2540087