header orient setting has no effect

[MakoSDV]

Setting the "orient" property under "header" for a "column" has no effect. The Header is always oriented to the top.

Tested using the online Vega Editor: Vega 5.17.0, Vega-Lite 4.16.8, Vega-Tooltip 0.24.2, Editor 0.89.0

{
  "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
  "data": { "url": "data/population.json"},
  "transform": [
    {"filter": "datum.year == 2000"},
    {"calculate": "datum.sex == 2 ? 'Female' : 'Male'", "as": "gender"}
  ],
  "width": {"step": 12},
  "mark": "bar",
  "encoding": {
    "column": {
      "field": "age", "type": "ordinal", "spacing": 10,
	  "header":{"orient":"bottom"}
    },
    "y": {
      "aggregate": "sum", "field": "people",
      "title": "population",
      "axis": {"grid": false}
    },
    "x": {
      "field": "gender",
      "axis": {"title": ""}
    },
    "color": {
      "field": "gender",
      "scale": {"range": ["#675193", "#ca8861"]}
    }
  },
  "config": {
    "view": {"stroke": "transparent"},
    "axis": {"domainWidth": 1}
  }
}

[kanitw]

Thanks for reporting, fixed in #7150