Configurable order of datastreams in Visualizer

[rgolovanov]

Currently, visualized data has fixed order in the Visualizer. For example, when draw multiple curves on same 2d plot it is impossible to change the order - this makes the analysis of data difficult and requires toggle visibility of overlapped curves.

See https://www.rerun.io/viewer?url=https%3A%2F%2Fapp.rerun.io%2Fversion%2F0.15.1%2Fexamples%2Fplots.rrd
It is impossible to change order of sin and cos:

[Wumpf]

This bottoms out to supporting the DrawOrder component for time series elements 👍

[rgolovanov]

@Wumpf it is more about dynamic draw order control via UI as we may not know which order is better at the code level.
I think same proposal shall be considered for 2D space view:
https://www.rerun.io/viewer?url=https%3A%2F%2Fapp.rerun.io%2Fversion%2F0.15.1%2Fexamples%2Fhuman_pose_tracking.rrd

[Wumpf]

Makes sense. I also think that draw order component (like any other component!) should be a thing one can change from the ui! But good point that this is the main important thing here and likely needs special consideration on how that's shown 🤔