<div 
    class="col-6 col-sm-2 px-1 py-1 m-auto m-md-0" 
    ng-repeat="boton in botones track by $index"
    ng-class="{'d-none d-md-grid': boton == ''}">
    <button
        type="button"
        class="btn btn-default btn-block btn-xs text-center py-1 rounded border border-light"
        ng-click="(boton != '') ? ejecutarFuncion(boton) : null"
        ng-class="{'d-sm-block h-100': boton == ''}"
    >
        <img src="../img/abmPrecios.png" alt="" ng-if="boton !== ''">
        <span>{{boton}}</span>
    </button>
</div>