Take manual control over Plotly sizing

[philippjfr]

The sizing behavior of the Plotly pane has been quite annoying since we first created it. The problem being that Plotly does not seem to correctly determine the size of its container on the initial render so what the user saw when using a responsive sizing mode was an initial render, followed by a visible resize event, i.e. noticeable flicker.

Rather than letting Plotly handle the sizing behavior itself I've decided that we are now going to simply take control of the sizing behavior ourselves by computing the sizes of the container and then applying those using a relayout call. This appears to work very well, particularly when throttled, since resizing is a relatively expensive operation (~25 ms for an ordinary plot).

Fixes #7445
Fixes #6173
Fixes #5970

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.36%. Comparing base (ce938bf) to head (13a6e3e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7483      +/-   ##
==========================================
- Coverage   82.38%   82.36%   -0.02%     
==========================================
  Files         339      339              
  Lines       50980    50980              
==========================================
- Hits        42000    41992       -8     
- Misses       8980     8988       +8     

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