Restore scrollbar position when patching

[Kadek]

No description provided.

[philippjfr]

Thanks so much! This looks good and I'll merge once tests pass.

[codecov]

Codecov Report

Merging #3327 (e6990fd) into master (fdbf05a) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3327      +/-   ##
==========================================
- Coverage   83.37%   83.33%   -0.04%     
==========================================
  Files         196      196              
  Lines       26541    26479      -62     
==========================================
- Hits        22129    22067      -62     
  Misses       4412     4412              

Impacted Files	Coverage Δ
panel/pane/plotly.py	81.90% <0.00%> (-3.08%)	⬇️
panel/io/reload.py	69.56% <0.00%> (-2.18%)	⬇️
panel/tests/command/test_serve.py	83.54% <0.00%> (-1.46%)	⬇️
panel/pane/base.py	88.00% <0.00%> (-0.89%)	⬇️
panel/io/state.py	69.11% <0.00%> (-0.23%)	⬇️
panel/tests/pane/test_plotly.py	98.58% <0.00%> (-0.20%)	⬇️
panel/models/perspective.py	100.00% <0.00%> (ø)
panel/pane/idom.py	27.40% <0.00%> (+0.20%)	⬆️
panel/pane/perspective.py	59.53% <0.00%> (+5.38%)	⬆️

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