fix: User comments

[orronai]

• Moved method to a new js file that only managers can use
• Now users can also comment, depends on config settings of USERS_COMMENTS

[codecov]

Codecov Report

Merging #309 (796c623) into master (a04bab5) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #309   +/-   ##
=======================================
  Coverage   79.80%   79.80%           
=======================================
  Files          59       59           
  Lines        2451     2451           
=======================================
  Hits         1956     1956           
  Misses        495      495           

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