app/views/overlay.pug
.connection(data-bind='fade: isIntercepted')
.overlay-background
.overlay-icon
span(data-bind='visible: infoType() === "loading"')
span.fa.fa-5x.fa-circle-o-notch.fa-spin
span(data-bind='visible: infoType() === "connection"', style='display: none')
span.fa.fa-5x.fa-plug