Ensuring that pinned publishers are not unpinned when decimal values are entered for the pin percentage

[ryanml]

Fixes #12001

Submitter Checklist:

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).
• Tagged reviewers and labelled the pull request as needed.
• Request a security/privacy review as needed. (Ask a Brave employee to help if you cannot access this document.)

Test Plan:

1. Enable payments, visit few sites to add it to ledger
2. Pin 3-4 sites in the ledger table
3. Change one of the pinned site value to random decimal value
4. Ensure site value changes to 1 and stays pinned.

Reviewer Checklist:

• Request a security/privacy review as needed if one was not already requested.

Tests

• Adequate test coverage exists to prevent regressions
• Tests should be independent and work correctly when run individually or as a suite ref
• New files have MPL2 license header

This is a very simple fix for the issues of decimal values unpinning a pinned publisher.

Inside the PinnedInput component, the callback for onBlur was interpreting decimal values less than 1 as falsey, causing them to be unpinned. This performs an additional check ensuring those cases are accounted for.

cc: @NejcZdovc

[codecov-io]

Codecov Report

Merging #13267 into master will decrease coverage by 0.03%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master   #13267      +/-   ##
==========================================
- Coverage   55.93%   55.89%   -0.04%     
==========================================
  Files         281      281              
  Lines       27856    27856              
  Branches     4571     4571              
==========================================
- Hits        15580    15571       -9     
- Misses      12276    12285       +9

Flag	Coverage Δ
#unittest	55.89% <0%> (-0.04%)	⬇️

Impacted Files	Coverage Δ
...erer/components/preferences/payment/pinnedInput.js	51.35% <0%> (ø)	⬆️
js/stores/appStoreRenderer.js	91.66% <0%> (-8.34%)	⬇️
app/renderer/components/reduxComponent.js	57.75% <0%> (-3.45%)	⬇️
js/stores/windowStore.js	27.65% <0%> (-0.3%)	⬇️

[NejcZdovc]

++ looks good. Great work 🎉

[ryanml]

Thanks @NejcZdovc!