Fix #565: 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 18.36%. Comparing base (c6b8fdc) to head (9ff07c6).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #565   +/-   ##
=========================================
  Coverage     18.36%   18.36%           
  Complexity      657      657           
=========================================
  Files            78       78           
  Lines          3496     3496           
=========================================
  Hits            642      642           
  Misses         2854     2854           

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