refactor: apply header ui guidelines on pages

[goga-m]

Summary

Includes minor changes on padding and alignment on the header component along with the affected pages.

• Refactor Header component based on UI styleguide

Affected pages using the Header:

• Help pages
• Vote
• MyRegistrations
• Contact

Checklist

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

[goga-m]

@faustbrian included these several pages along with the Header component, as their snapshots were already affected, and were minor changes for the pages.

[codecov]

Codecov Report

Merging #2355 into 3.0-react will not change coverage.
The diff coverage is 100.00%.

@@              Coverage Diff              @@
##           3.0-react     #2355     +/-   ##
=============================================
  Coverage     100.00%   100.00%             
=============================================
  Files             24       220    +196     
  Lines            142      2227   +2085     
  Branches          18       419    +401     
=============================================
+ Hits             142      2227   +2085     

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/components/Address/Address.tsx	100.00% <100.00%> (ø)
src/app/components/Address/utils.ts	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 245 more

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[goga-m]

@faustbrian, patching with another commit for the header line-height issue