Hotfix/Temp Plots Backend html files

[tehcoderer]

Fix: Edge case of temp html files deleted when multiple terminals are open and one is closed

fixes #4443

Description

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[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (develop@6a26d4e). Click here to learn what that means.
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop    #4448   +/-   ##
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  Coverage           ?   54.70%           
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  Files              ?      596           
  Lines              ?    53638           
  Branches           ?        0           
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  Hits               ?    29345           
  Misses             ?    24293           
  Partials           ?        0           

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