.mce-selected-text-box{
    cursor: pointer !important;
    background: #ccc !important;
    padding: 3px !important;
    border-radius: 5px !important;
    width: 300px !important;
}
.mce-selected-text-box:after{
    content: "x" !important;
    margin-left: 6px;
    background: #d9534f;
    border-radius: 30px;
    padding: 1px 5px 2px 6px;
    color: #fff;
}
.mce-custom-dialog-wrapper .mce-window-body .mce-panel {
    width: 800px;
}