.mce-i-shortcode:before {
    content: "\f1c9";
    font-family: FontAwesome;
    text-decoration: inherit;    
}

.mce-form-add-btn {
    position: relative !important;
    top: -56px;
    padding: 6px 5px 2px 5px !important;
    border: 1px solid #5c5c5c !important;
    left: -337px;
}