[Frontend] Adjust plus sign on attack pattern field

[johanah29]

#1044

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 26.77%. Comparing base (fa367c8) to head (8bf63e6).
Report is 20 commits behind head on master.

❗ Current head 8bf63e6 differs from pull request most recent head 522ee04

Please upload reports for the commit 522ee04 to get more accurate results.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #1073   +/-   ##
=========================================
  Coverage     26.77%   26.77%           
  Complexity     1052     1052           
=========================================
  Files           468      468           
  Lines         11059    11059           
  Branches        558      558           
=========================================
  Hits           2961     2961           
  Misses         8013     8013           
  Partials         85       85           

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[RomuDeuxfois]

I think we can dig on endAdornment option

https://stackoverflow.com/questions/70475707/mui-autocomplete-endadornment-blowing-away-default-clearicon