Chart improvements

[rjahn]

Pie chart:

If you have long labels, the labels are inside the chart and overlap other areas in the chart. With short labels it looks better but only as long as the segment is big enough.

Same in chart legend. Label too long, overlaps other labels.

We could try if there's a feature in the chart library to move labels outside the chart and shorten the legend or set clipping areas?

If we can't fix it with existing API: open an issue for the chart library

[ToniHeiss]

Example for the pie chart.

[ToniHeiss]

Affects new charts implemented by #169

[ToniHeiss]

There does not seem to be a solution for the labels in pie charts with this library.

[ToniHeiss]

Current open issues:
entronad/graphic#275
entronad/graphic#259

[rjahn]

labels outside the chart are working with rose chart, but I guess this chart type is a special solution?

[ToniHeiss]

would look like this then, would not be a pie chart anymore.

[rjahn]

It was just an input that this chart type shows labels outside