Bug fixes for links with underscores

[mdshamoon]

Summary

Fixes for #1207

[codecov]

Codecov Report

Merging #1215 (47ad78c) into master (6d8410d) will increase coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1215      +/-   ##
==========================================
+ Coverage   72.04%   72.12%   +0.07%     
==========================================
  Files         156      156              
  Lines        4400     4405       +5     
  Branches      921      923       +2     
==========================================
+ Hits         3170     3177       +7     
+ Misses        922      921       -1     
+ Partials      308      307       -1     

Impacted Files	Coverage Δ
src/common/RichEditor.tsx	57.14% <100.00%> (+6.12%)	⬆️
...atMessages/MessagesWithLinks/MessagesWithLinks.tsx	100.00% <100.00%> (+18.18%)	⬆️

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[DigneshGujarathi]

Looks good