fix positive_score and low_score comments options

[akellbl4]

• enable downvoting for only positive. it should give ability to downvote until score is 0
• restore low_score state of a comment. it should make comment semi transparent when downvoted

[codecov]

Codecov Report

Merging #1337 (e41d16e) into master (bf6a08b) will increase coverage by 0.01%.
The diff coverage is 80.00%.

@@            Coverage Diff             @@
##           master    #1337      +/-   ##
==========================================
+ Coverage   50.18%   50.19%   +0.01%     
==========================================
  Files         139      139              
  Lines        3003     3008       +5     
  Branches      683      690       +7     
==========================================
+ Hits         1507     1510       +3     
- Misses       1484     1486       +2     
  Partials       12       12              

Impacted Files	Coverage Δ
frontend/app/components/comment/comment.tsx	60.71% <66.66%> (+0.16%)	⬆️
frontend/app/components/comment/comment-votes.tsx	95.55% <100.00%> (-0.10%)	⬇️

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[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
public/embed.mjs	2.02 KB (0%)	41 ms (0%)	100 ms (-0.1% 🔽)	141 ms
public/remark.mjs	65.87 KB (+0.06% 🔺)	1.4 s (+0.06% 🔺)	177 ms (-27.8% 🔽)	1.5 s
public/remark.css	8.17 KB (+0.02% 🔺)	164 ms (+0.02% 🔺)	0 ms (+100% 🔺)	164 ms
public/last-comments.mjs	31.95 KB (+0.12% 🔺)	639 ms (+0.12% 🔺)	195 ms (+17.42% 🔺)	834 ms
public/last-comments.css	3.78 KB (0%)	76 ms (0%)	0 ms (+100% 🔺)	76 ms
public/deleteme.mjs	9.92 KB (0%)	199 ms (0%)	108 ms (-12.76% 🔽)	307 ms
public/counter.mjs	749 B (0%)	15 ms (0%)	103 ms (-21.15% 🔽)	118 ms