<FormItem 
    class="w-100 smart-form-item"
    [ngClass]="{ first: i === 0 }"
    style="margin-left: 0px; margin-right: 0px;"
    *ngFor="let item of formItems let i=index"
    [definition]="item">
</FormItem>

./smart-form.column.css

::ng-deep FormItem {
    padding-left: 5px !important;
    padding-right: 5px !important;
    display: block;
}