Fix #4700 - "Show all" does not display all individuals in list

[jon48]

Most of my comments about it are already in the bug section.

In the PR, I am giving a slightly different version than in my last comment, but hopefully, it has the same behavior.

It is the first time I have dug into the n_surn / n_surname logic, and I hope I have not missing something fundamentals. Whilst testing, I noted some oddities around the "no surname" case, and case sensitivity, but I feel they go beyond that PR, and I will probably raise further issues to discuss those.

[codecov[bot]]

Codecov Report

Merging #4743 (94edd21) into main (8634feb) will increase coverage by 0.00%. The diff coverage is 85.71%.

@@            Coverage Diff            @@
##               main    #4743   +/-   ##
=========================================
  Coverage     30.89%   30.90%           
- Complexity    11357    11358    +1     
=========================================
  Files          1188     1188           
  Lines         47891    47896    +5     
=========================================
+ Hits          14796    14800    +4     
- Misses        33095    33096    +1     

Impacted Files	Coverage Δ
app/Module/IndividualListModule.php	61.72% <85.71%> (+0.24%)	:arrow_up:

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[arbor95]

there has recently (#4904) been a change to this module, so that your patch is no longer valid. Please try actual code and perhaps create a new pull request and close this one!