[frontend] fix bad behaviour onBlur Markdown fields (#5943)

[frapuks]

Proposed changes

• Fix bad behaviour for saving Markdown fields
• Text is not saved when a Markdown formatting button is clicked (Heading, Bold...).
• Text is saved when the field is defocused, with Makdown formatting.
• Saving even when the field is defocused by focusing another Markdown or TextArea field

Related issues

• Markdown in rich text fields is reverted when first applied #5943

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

• A good example form is on page : Techniques / Courses of Actions / select one / update

For testing

• Update description text (write "test" for example)
• click on title button => Expected : Markdown form field content is updating ("### test"), but not description on overview / details / description
• click outside Markdown field => Expected : saving description, and display on overview / details / description
• try the same, when clicking outside, try focusing other form input, other markdown field (Threat hunting techniques), other textarea field (Log sources), etc => Expected : saving description, and display on overview / details / description

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.74%. Comparing base (18c4db8) to head (952b6bd).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6035      +/-   ##
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+ Coverage   66.72%   66.74%   +0.01%     
==========================================
  Files         540      540              
  Lines       64180    64180              
  Branches     5240     5242       +2     
==========================================
+ Hits        42827    42834       +7     
+ Misses      21353    21346       -7     

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[JeremyCloarec]

There is a small edge case when the bug still occurs.
You filter the markdown button click to prevent the field from saving when applying markdown, which works. But we still want to save the text when focusing on the markdown button of the other Markdown field.
I can do a screen share if what I explained isn't clear

[frapuks]

There is a small edge case when the bug still occurs. You filter the markdown button click to prevent the field from saving when applying markdown, which works. But we still want to save the text when focusing on the markdown button of the other Markdown field. I can do a screen share if what I explained isn't clear

Fix with refactoring condition :

• Before : check if the html node is INPUT, DIV, BUTTON, UNDEFINED, TEXTAREA (with other conditions if it's Textaera).
• Now : check only if click is inside or outside MardkownField.

it works if you click on markdown format button of current markdown field => the click in considered inside => no saving, continue to edit the same field
It works even if you click on markdown format button in othe markdown field => the click is outside => saving the current field on blur, and focus the new markdown field

[JeremyCloarec]

Tested OK