Fix #578: Add the missing @property tags

[mspirkov]

Q	A
Is bugfix?	✔️/❌
New feature?	✔️/❌
Breaks BC?	❌
Tests pass?	✔️
Fixed issues	comma-separated list of tickets # fixed by the PR, if any

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.60%. Comparing base (d645e82) to head (918270e).

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #578   +/-   ##
=========================================
  Coverage     46.60%   46.60%           
  Complexity      586      586           
=========================================
  Files            45       45           
  Lines          2521     2521           
=========================================
  Hits           1175     1175           
  Misses         1346     1346           

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