echart timeseries group by error

[grimbeorn74]

Adding a field in group-by control menu makes the chart show an error " Referenced columns not available in dataFrame"

Expected results

show multiple rows based on group-by values

Actual results

showing error

Screenshots

If applicable, add screenshots to help explain your problem.

How to reproduce the bug

1. Go to 'chart'
2. create a new chart based on flights table
3. choose echarts timeseries
4. time column: ds, metrics:sum(taxi_out) (or whatever metrics field), group-by: day_of_week (or whatever field)

Environment

• superset version: 0.37.2 39cce71 (HEAD -> master, origin/master, origin/HEAD)
• python version: python3.6
• node.js version: v8.10.0

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[junlincc]

@villebro 🙏

[villebro]

Oh, I didn't notice this! This was fixed by #11103 (this feature is not available on 0.37.2)