Fix/poll display 88

[ryuash]

Description

fixes #88

Checklist

• [x] Targeted PR against correct branch.
• [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• [ ] Wrote unit tests.
• [x] Run flutter format.
• [ ] Updated the documentation.
• [ ] Added an entry to the CHANGELOG.md file.
• [x] Re-reviewed Files changed in the Github PR explorer.

[ryuash]

Wasn't sure if i needed to update changelog

[codecov[bot]]

Codecov Report

Merging #91 into master will increase coverage by 0.06%. The diff coverage is 86.95%.

@@            Coverage Diff             @@
##           master      #91      +/-   ##
==========================================
+ Coverage   17.72%   17.79%   +0.06%     
==========================================
  Files         258      258              
  Lines        6290     6295       +5     
==========================================
+ Hits         1115     1120       +5     
  Misses       5175     5175              

Impacted Files	Coverage Δ
lib/sources/posts/local/local_posts_source.dart	90.15% <86.36%> (+0.38%)	:arrow_up:
lib/repositories/posts/posts_repository_impl.dart	94.82% <100.00%> (ø)

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[RiccardoM]

Wasn't sure if i needed to update changelog

I think we can add a line under the Bug Fixes category that reads:

Fixed a bug that causes a wrong visualization of a post details

I usually add a changelog entry only when I change something or fix a bug that was present on the previous public beta, and so external users can notice has been changed.