refactor: make wallets sheet menu stick to bottom

[dated]

Summary

Makes the WalletBottomSheetMenu appear dynamically based on wallets length and fixes some colors and spacings.

Checklist

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

[codecov]

Codecov Report

Merging #2465 into 3.0-react will not change coverage.
The diff coverage is 100.00%.

@@              Coverage Diff              @@
##           3.0-react     #2465     +/-   ##
=============================================
  Coverage     100.00%   100.00%             
=============================================
  Files             24       264    +240     
  Lines            142      2592   +2450     
  Branches          18       478    +460     
=============================================
+ Hits             142      2592   +2450     

Flag	Coverage Δ
#unit	100.00% <100.00%> (?)

Impacted Files	Coverage Δ
src/app/components/Button/Button.tsx	100.00% <ø> (ø)
src/app/components/Card/CardControl.tsx	100.00% <ø> (ø)
src/app/App.tsx	100.00% <100.00%> (ø)
src/app/components/Address/Address.tsx	100.00% <100.00%> (ø)
src/app/components/Alert/Alert.tsx	100.00% <100.00%> (ø)
src/app/components/Avatar/Avatar.tsx	100.00% <100.00%> (ø)
src/app/components/Badge/Badge.styles.ts	100.00% <100.00%> (ø)
src/app/components/Badge/Badge.tsx	100.00% <100.00%> (ø)
src/app/components/Breadcrumbs/Breadcrumbs.tsx	100.00% <100.00%> (ø)
src/app/components/Button/Button.styles.ts	100.00% <100.00%> (ø)
... and 288 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c9e749f...4985b7b. Read the comment docs.