IS: added IS-climate-change-basic-v10-old.nlogo

uses old interface for serializing data
Merge branch 'master' into inquiry-space
fix mml conversion tests, add: electricFieldColor
Fix rectangles serialization

[#53941171]
Add test of rectangles MML->JSON conversion and serialization

[#53941171]
Serialize electric fields + add test of conversion and serialization

[#52998997]
Update particles acceleration after invalidating change

[#53552969] [#53552857]

in .readModelState()
Use empty model while calling .tick() in tests to avoid divergence

[#53552969]
Remove playback buttons from "Amout of Charge" interactive

I believe this interactive wasn't intended to be actually started.
Now forces are visualized even when model is stopped.
Fix small bug in click handlers
Fix typos
add example of unavailable JS objects and methods
Let user show only direction of forces ("forceVectorsDirectionOnly")

[#53397293]
Update MML->JSON tests ("forceVectorsDirectionOnly")

[#53397293]
Update "Amout of Charge" interactive

[#53397293]
rm obsolete comment
Reformat comment
fix indentation
QD: clarify some variable/method names
QD integration loop: move photons, then interact