Reversed the removal of the validating trait since @roberthorlings discovered it's actually still being used.
Reversed the removal of the validating trait since @roberthorlings discovered it's actually still being used.

firefly-iii/firefly-iii,tonicospinelli/firefly-iii,firefly-iii/firefly-iii,JC5/firefly-iii,tonicospinelli/firefly-iii,firefly-iii/firefly-iii,tonicospinelli/firefly-iii,tonicospinelli/firefly-iii,firefly-iii/firefly-iii,JC5/firefly-iii