Always check GUIPrefs if incline highlighting is on

[SJuliez]

Fixes #6100

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 29.07%. Comparing base (ab3b4b4) to head (6e9f3f2).
Report is 12 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #6111   +/-   ##
=========================================
  Coverage     29.07%   29.07%           
- Complexity    13970    13972    +2     
=========================================
  Files          2601     2601           
  Lines        267448   267447    -1     
  Branches      47758    47758           
=========================================
+ Hits          77764    77767    +3     
+ Misses       185788   185782    -6     
- Partials       3896     3898    +2     

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