[frontend] fix breadcrumbs (#6164)

[frapuks]

Proposed changes

• Update breadcrumbs in Cases / Feedbacks with right value
• Add breadcrumbs in Settings / Customization / Decay Rules

Related issues

• Breadcrumbs error on Case #6164

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

• I used the same string as in the menu so that the translation would work for sure.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.68%. Comparing base (f0c79df) to head (277f47c).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6168   +/-   ##
=======================================
  Coverage   66.68%   66.68%           
=======================================
  Files         540      540           
  Lines       64349    64349           
  Branches     5251     5252    +1     
=======================================
+ Hits        42912    42914    +2     
+ Misses      21437    21435    -2     

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