Silly things.

index.css

/*
    Fix for Windows Phone 8 device width bug    
*/
@-ms-viewport {
    width: device-width;
}

index.html

<script type="text/javascript">
        (function () {
            if ("-ms-user-select" in document.documentElement.style && navigator.userAgent.match(/IEMobile\/10\.0/)) {
                var msViewportStyle = document.createElement("style");
                msViewportStyle.appendChild(
                    document.createTextNode("@-ms-viewport{width:auto!important}")
                );
                document.getElementsByTagName("head")[0].appendChild(msViewportStyle);
            }
        })();
    </script>