[Feature request] graph shading from x-axis instead of bottom of line chart

I don’t know if this feature request has come up before, but could the coloring of the charts in the ‘Insights’ section be changed? Currently, line charts are filled with a color gradient starting from the bottom, which looks odd with negative values. It would be better if the chart were colored starting from the x-axis (y=0), extending upwards and/or downwards.