fix: Relations are missing a focus outline on a single item title

[gitstart]

What does it do?

Adds outline on a single item title once focused

Why is it needed?

BoxEllipsis causes LinkEllipsis :focus-visible:after "outline" to be hidden, resulting in focus outline position being lost when focused on the item link title.

How to test it?

• Create a content-type with a related field.
• Add at least one relation.
• Tab through the relation item(s).
• Notice that the item name is outlined once focused.

Related issue(s)/PR(s)

Fixes #15108

Demo

Screen.Recording.2022-12-12.at.5.13.08.PM.mov

[codecov]

Codecov Report

Base: 59.87% // Head: 59.90% // Increases project coverage by +0.02% 🎉

Coverage data is based on head (8de62f9) compared to base (a497626).
Patch coverage: 50.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #15164      +/-   ##
==========================================
+ Coverage   59.87%   59.90%   +0.02%     
==========================================
  Files        1348     1348              
  Lines       32810    32811       +1     
  Branches     6260     6260              
==========================================
+ Hits        19646    19654       +8     
+ Misses      11308    11302       -6     
+ Partials     1856     1855       -1     

Flag	Coverage Δ
back	50.07% <ø> (ø)
front	64.36% <50.00%> (+0.03%)	⬆️
unit_back	50.07% <ø> (ø)
unit_front	64.36% <50.00%> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...-manager/components/RelationInput/RelationInput.js	90.90% <ø> (-0.06%)	⬇️
packages/core/admin/admin/src/pages/App/index.js	66.66% <50.00%> (-0.65%)	⬇️
...core/admin/admin/src/hooks/useFetchClient/index.js	100.00% <0.00%> (+66.66%)	⬆️

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[ronronscelestes]

thank you @gitstart
just a small proposition :)

[ronronscelestes]

LGTM, thank you @gitstart 😊
The tests are not launching weirdly, could you try to update your branch with main to see if it fixes it? 👀

[gitstart]

This PR was pushed through Gitstart, with contributions from @raph941, @phunguyenmurcul.