Add a warning for using chart grid with only one series

Quartz / Chartbuilder

A front-end charting application that facilitates easy creation of simple beautiful charts

http://quartz.github.io/Chartbuilder

MIT License

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Open yanofsky opened 8 years ago

yanofsky commented 8 years ago

If there is only one series, and it's displayed as a column, dot, or line in a chartgrid there should be a warning