Plotly.js traces carrying error_y / error_x,
auto-detected by MAIDR as interval charts rather than as a scatter or a
bar chart. Click on a chart and use arrow keys: left and right walk the
samples, up and down walk the lower bound, the estimate and the upper
bound at one sample — so whether two intervals overlap can be traced by
ear.
error_y on a scatter)error_y on bars)error_x)