💄 [UI/UX] Max-width for attached files thumbnails

[camillemonchicourt]

Description

Not sure I made it in the right CSS file.
And I initially thought it was rather to do in Django-mapentity, but this CSS class was only used in Geotrek-admin.

It fixes a max-width to images thumbnails in attached files list.

For Youtube links attached files :

Before :

After :

For external images :

Before :

After :

Related Issue

Checklist

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.47%. Comparing base (5c6c020) to head (f929509).
Report is 4 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4546   +/-   ##
=======================================
  Coverage   98.47%   98.47%           
=======================================
  Files         270      270           
  Lines       21534    21534           
=======================================
  Hits        21205    21205           
  Misses        329      329           

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[cypress]

Geotrek-admin    Run #11293

Run Properties:   Passed #11293  •  0e75acbe35 ℹ️: Merge f9295097177410912a8a6c9dc207eb93580b5ba2 into 2ff77b6d9c22ec91cdaf1b5be76e...

Project	Geotrek-admin
Branch Review	refs/pull/4546/merge
Run status	Passed #11293
Run duration	02m 02s
Commit	0e75acbe35 ℹ️: Merge f9295097177410912a8a6c9dc207eb93580b5ba2 into 2ff77b6d9c22ec91cdaf1b5be76e...
Committer	Camille Monchicourt
View all properties for this run ↗︎

---

Test results
Failures	0
Flaky	0
Pending	0
Skipped	0
Passing	22
View all changes introduced in this branch ↗︎