fix: Remove extra margin around body element

[Lunyachek]

This pull request proposes fixing the margin around the body element. This margin comes from the tinyMCE styles. In cases where we don't have a custom theme, and the header and footer are white, it's not noticeable (1st screenshot). However, if the header and footer have any color, it immediately stands out (2nd and 3rd screenshots). The important property is set not by chance, as without it, the styles from the tinyMCE override the styles from the index.scss file.

[openedx-webhooks]

Thanks for the pull request, @Lunyachek!

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.06%. Comparing base (5f61578) to head (4ebd3e9).
Report is 12 commits behind head on master.

❗ Current head 4ebd3e9 differs from pull request most recent head 9885bee. Consider uploading reports for the commit 9885bee to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #193   +/-   ##
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  Coverage   83.06%   83.06%           
=======================================
  Files          46       46           
  Lines         685      685           
  Branches      132      132           
=======================================
  Hits          569      569           
  Misses        116      116           

☔ View full report in Codecov by Sentry.
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[mphilbrick211]

Hi @openedx/committers-frontend! This is ready for review, as is the backport. Thanks!

[brian-smith-tcril]

This issue seems to be bigger than just the margins. When inspecting I found

vs

I don't think that going through and overriding all the tinymce styles with !important is a sustainable solution, have you looked into any recommended strategies for not having tinymce styles leak out into the rest of the page?

[Lunyachek]

I don't think that going through and overriding all the tinymce styles with !important is a sustainable solution, have you looked into any recommended strategies for not having tinymce styles leak out into the rest of the page?

You're definitely right! I looked deeper and found a solution in the MFE discussions - https://github.com/openedx/frontend-app-discussions/blob/master/src/components/TinyMCEEditor.jsx I applied the fix in the same way

[mphilbrick211]

Hi @Lunyachek and @brian-smith-tcril, just checking in on this!

[mphilbrick211]

Hi @Lunyachek and @brian-smith-tcril, just checking in on this!

Friendly follow-up on this @Lunyachek @brian-smith-tcril

[brian-smith-tcril]

I think this is likely a good solution, but I'd like to get a second opinion on using raw-loader. @arbrandes thoughts?

Context: Since my previous review this PR has been updated to follow the raw-loader pattern for loading TinyMCE styles that we are using in the discussions MFE. I'm just not sure if this is a pattern we want to continue using, or if we should be looking for a pattern we like more to apply in places we are currently using this pattern.