[FMS] Allow users to opt out of questionnaires

[nephila-nacrea]

Closes #1265.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (824a22d) 85.28% compared to head (1690272) 85.36%.

❗ Current head 1690272 differs from pull request most recent head 6807d24. Consider uploading reports for the commit 6807d24 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4758      +/-   ##
==========================================
+ Coverage   85.28%   85.36%   +0.08%     
==========================================
  Files         339      339              
  Lines       24607    25011     +404     
  Branches     4670     4786     +116     
==========================================
+ Hits        20985    21350     +365     
- Misses       2199     2226      +27     
- Partials     1423     1435      +12     

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[dracos]

Looking good, thanks for the privacy page updates, couple of small things, plus one issue to stop people suddenly getting all their missing questionnaires.

[dracos]

Great :)