Fixing Card Group Responsiveness Errors

[gilmar]

@media (max-width:768px) {
.card-group {
display: -ms-flexbox;
display: initial;
-ms-flex-flow: row;
flex-flow: row;
}
}

@media (max-width: 768px) {
.card-group > .card {
-ms-flex: 1 0 0%;
flex: 1 0 0%;
margin-bottom: 0;
}
}

Improvement