ComboLineColumnChart renders bars, not columns

[eschercode]

Seems to be an axis problem with the ComboLineColumnChart as it shows nonsensical horizontal bars (in both my testing, and in the official demo app) instead of colums. May be a wider issue, as for example
the screenshot of the "horizontal" bar chart has vertical bars instead of horizontal. Also, this Activity's title shouldn't be named column chart as columns are by definition vertical.

[eschercode]

I now realize, after comparison of the ColumnChart and ComboLineColumChart samples that the isHorizontal argument is missing: ColumnChartData(columns, isHorizontal = false).