fix(menu): path fragment comparison

[yggg]

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• I read and followed the CONTRIBUTING.md guide.
• I read and followed the New Feature Checklist guide.

Short description of what this resolves:

Described in #1660 (comment)

[codecov]

Codecov Report

Merging #1809 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master    #1809   +/-   ##
=======================================
  Coverage   83.91%   83.91%           
=======================================
  Files         232      232           
  Lines        7568     7568           
  Branches      665      665           
=======================================
  Hits         6351     6351           
  Misses       1023     1023           
  Partials      194      194

Impacted Files	Coverage Δ
...rc/framework/theme/components/menu/menu.service.ts	87.32% <100%> (ø)	⬆️