choropleth hover labels can get lost

[alexcjohnson]

If you zoom into a choropleth (say for example http://localhost:3000/devtools/test_dashboard/#geo_country-names) and hover on a region that goes off the edge, the hover label can get lost. Here's one where you just see the bottom of the Russia label (and if I zoom in a little more it disappears entirely):

The label should get pushed down onto the plot, like we do with regular cartesian types:

One thing that may help a bit: the hover labels don't need to be clipped to the same viewport as the plot: the tip of the arrow should be constrained to that viewport, but the rest of the label can go outside (as long as the whole thing stays withingd)

[etpinard]

the hover labels don't need to be clipped to the same viewport as the plot

Yeah. That would be a nice improvement to start. Choropleth hover labels should be drawn in the <g infolayer> node. While at it, we should 🔪 that useless <div geo-container>:

and put the geo nodes in the main <svg>.

---

Down the road, to better handle edge cases, we should consider extending the hoveron: 'fill' hover placement algo to geo polygons.