Trigger textbox changes in settings on lost focus

[Tyrrrz]

Closes #288

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.35%. Comparing base (2582ed3) to head (ed353ea).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #289   +/-   ##
=======================================
  Coverage   96.35%   96.35%           
=======================================
  Files           7        7           
  Lines         192      192           
  Branches       15       15           
=======================================
  Hits          185      185           
  Misses          6        6           
  Partials        1        1           

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