fix: hide border on sender in detail modals

[dated]

Summary

Removes the top border on the sender in transaction detail modals.

Checklist

• Documentation (if necessary)
• Tests (if necessary)
• Ready to be merged

[codecov]

Codecov Report

Merging #2893 into develop will increase coverage by 41.07%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##           develop     #2893       +/-   ##
=============================================
+ Coverage    58.92%   100.00%   +41.07%     
=============================================
  Files          373       343       -30     
  Lines         9325      4765     -4560     
  Branches      1934       869     -1065     
=============================================
- Hits          5495      4765      -730     
+ Misses        3603         0     -3603     
+ Partials       227         0      -227     

Flag	Coverage Δ
#unit	100.00% <ø> (?)

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Impacted Files	Coverage Δ
src/app/App.tsx	100.00% <ø> (ø)
src/renderer/store/base.js
src/renderer/store/modules/ledger.js
src/renderer/plugins/alert-events.js
src/renderer/services/wallet.js
src/renderer/pages/Profile/ProfileEdition.vue
src/renderer/store/modules/peer/fallback.js
...ponents/Wallet/WalletHeading/WalletHeadingInfo.vue
...rer/components/PluginManager/PluginManagerGrid.vue
.../renderer/store/plugins/vuex-persist-migrations.js
... and 707 more

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