Fix crash when attempting to change application whitelist

[Tyrrrz]

Closes #293

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.35%. Comparing base (097316d) to head (b70a0ca).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #305   +/-   ##
=======================================
  Coverage   96.35%   96.35%           
=======================================
  Files           7        7           
  Lines         192      192           
  Branches       15       15           
=======================================
  Hits          185      185           
  Misses          6        6           
  Partials        1        1           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.