Vega Script input textarea invisible

[ysoldak]

We've installed this awesome plugin in Grafana 7.15.1, and had hard time to input or edit Vega visualisation definition.
The text area is 5px high.

Fixed that by manually editing height attribute of the text area via browser debugger.

I believe the following line is causing problems, change it to "200px" (or even "500px") instead?

grafana-infinity-panel/src/panels/vega.tsx

Line 75 in 90648a3

height={'200'}