.ui-multiselect-hasfilter ul {
    position: relative;
    top: 2px;   
}
.ui-multiselect-filter {float:left;margin-right:10px;font-size:11px;display: block;position: relative;width: calc(100% - 6px);color: #666;}
    .ui-multiselect-filter input {
        font-family: Roboto, sans-serif;
        font-size: 14px;
        display: block;
        font-weight:normal;
        color: black;
        margin-left: 0;
        height: 24px;
        padding:6px 0px 6px 6px;
        border: 1px solid #cdcdcd;
        -webkit-appearance: textfield;
        -webkit-box-sizing: content-box;
        width: 100%;
    }