Hide delete button for non-admin users after edit period expires

[paskal]

Resolves #1737. The user couldn't delete their comment once EditDuration passes.

[github-actions]

size-limit report 📦

Path	Size
public/embed.mjs	2.03 KB (0%)
public/remark.mjs	73.46 KB (+0.01% 🔺)
public/remark.css	8.26 KB (0%)
public/last-comments.mjs	35.72 KB (+0.01% 🔺)
public/last-comments.css	3.75 KB (0%)
public/deleteme.mjs	12.07 KB (0%)
public/counter.mjs	751 B (0%)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.47%. Comparing base (e1173bb) to head (989c36a).
Report is 9 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1751   +/-   ##
=======================================
  Coverage   61.47%   61.47%           
=======================================
  Files         132      132           
  Lines        2998     2998           
  Branches      715      715           
=======================================
  Hits         1843     1843           
  Misses       1151     1151           
  Partials        4        4           

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