Fixes/bugs and css

[ryuash]

Description

Couple of things:

• Renamed the secondary button as there is one with a white border in light mode and primary border in dark mode but there is also a button where light and dark mode would result in a primary border
• Added an extra filter to erroredPosts to only display user's own posts. [This is just a just in case]
• And then some ui adjustments
• Went ahead and added the mooncake icon like the wireframe
• Refactored the stack code for likes counter and pushed it up to 6 likes before hiding
• Change export mnemonic ui to be more friendly

Checklist

• [x] Targeted PR against correct branch.
• [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• [x] 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.

[codecov[bot]]

Codecov Report

Merging #130 into master will decrease coverage by 0.02%. The diff coverage is 85.48%.

@@            Coverage Diff             @@
##           master     #130      +/-   ##
==========================================
- Coverage   61.93%   61.90%   -0.03%     
==========================================
  Files         266      266              
  Lines        6741     6744       +3     
==========================================
  Hits         4175     4175              
- Misses       2566     2569       +3     

Impacted Files	Coverage Δ
lib/ui/screens/home_screen/index.dart	0.00% <0.00%> (ø)
...login_screen/widgets/login_main_content/index.dart	0.00% <0.00%> (ø)
...trics_screen/widgets/set_biometric_body/index.dart	0.00% <0.00%> (ø)
lib/ui/widgets/bottom_navigation_bar/index.dart	85.71% <83.33%> (-2.29%)	:arrow_down:
lib/ui/widgets/export_mnemonic_popup/index.dart	78.37% <90.90%> (+0.87%)	:arrow_up:
...me_screen/widgets/mnemonic_backup_popup/index.dart	75.00% <100.00%> (ø)
.../screens/home_screen/widgets/posts_list/index.dart	71.05% <100.00%> (+1.18%)	:arrow_up:
..._screen/widgets/account_created_content/index.dart	100.00% <100.00%> (ø)
...screen/widgets/account_creating_content/index.dart	100.00% <100.00%> (ø)
...i/widgets/buttons/secondary_dark_button/index.dart	100.00% <100.00%> (ø)
... and 3 more

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