[stable4.7] fix(attachments): improve layout

[backportbot]

Backport of PR #6274

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 15.51%. Comparing base (f1dcbde) to head (b4f95a0).
Report is 3 commits behind head on stable4.7.

Files	Patch %	Lines
.../components/Editor/Attachments/AttachmentsList.vue	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           stable4.7    #6277   +/-   ##
==========================================
  Coverage      15.51%   15.51%           
==========================================
  Files            206      206           
  Lines           9256     9256           
  Branches        1931     1931           
==========================================
  Hits            1436     1436           
  Misses          7820     7820           

Flag	Coverage Δ
javascript	15.51% <0.00%> (ø)

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