Improve tab styling

[lukaw3d]

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[cloudflare-workers-and-pages]

Deploying with    Cloudflare Pages

Latest commit:	18ff3b5
Status:	✅  Deploy successful!
Preview URL:	https://b0416aab.oasis-wallet.pages.dev
Branch Preview URL:	https://lw-tab-style.oasis-wallet.pages.dev

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[codecov]

Codecov Report

Merging #1655 (18ff3b5) into master (ac0ad1a) will decrease coverage by 0.12%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1655      +/-   ##
==========================================
- Coverage   81.33%   81.21%   -0.12%     
==========================================
  Files         171      171              
  Lines        4345     4345              
  Branches      777      777              
==========================================
- Hits         3534     3529       -5     
- Misses        811      816       +5     

Flag	Coverage Δ
cypress	49.64% <ø> (ø)
jest	76.44% <ø> (-0.17%)	⬇️

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

Files Changed	Coverage Δ
src/styles/theme/ThemeProvider.tsx	100.00% <ø> (ø)

... and 2 files with indirect coverage changes