possible bug

@ejmm320 and @alfredorico propose that .form-control-feedback, input-lg and input-sm has been isolated and we think that must be inside .has-feedback { } group
We have experienced issues with span form-control-feedback on errors form feedback 
If you look at version 3.1.1.0, .form-control-feedback, input-lg and input-sm were inside .has-feedback { } group