User mentions suggest should only show validated users.

[frankdekker]

No description provided.

[codecov]

Codecov Report

Merging #310 (9ceface) into master (1858203) will not change coverage.
The diff coverage is 100.00%.

❗ Current head 9ceface differs from pull request most recent head 44c04b8. Consider uploading reports for the commit 44c04b8 to get more accurate results

@@             Coverage Diff             @@
##              master      #310   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
- Complexity      2585      2587    +2     
===========================================
  Files            442       442           
  Lines           7718      7720    +2     
===========================================
+ Hits            7718      7720    +2     

Impacted Files	Coverage Δ
...ntroller/App/User/UserMentionSuggestController.php	100.00% <100.00%> (ø)
src/Repository/User/UserRepository.php	100.00% <100.00%> (ø)

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