Kanit Wongsuphasawat

## Bug Description ```json { "$schema": "https://vega.github.io/schema/vega-lite/v5.json", "data": {"url": "data/movies.json"}, "mark": "area", "encoding": { "x": { "bin": true, "field": "IMDB Rating" }, "y": {"aggregate": "count"}, "color": {"field": "Major Genre"} }...

Make default vega format null as "null". Context: I was trying to fix this in Vega-Lite, but then realize that it seems instead of add conditional expression *everywhere* in Vega-Lite....

Moving the important step about having a local instead of Vega Editor to be in the repo set up storage. @domoritz Since you have changed editor setup recently, can you...

## PR Description support relative point size, as a multiplier of geometric mean of width and height.

Automatically set aria:false if the renderer is canvas

1

We should automatically set `aria: false` if the renderer is canvas since aria descriptions are not used on canvas (they only make sense for SVG), and they can be expensive...