.sliderBlank .irs-bar-edge, .sliderBlank .irs-bar {
background: none;
border: none;
}
.sliderBlank .irs-bar-edge, .sliderBlank .irs-bar {
background: none;
border: none;
}

div#shiny-disconnected-overlay:before {
	content: "Your session has timed out. Please reload to start a new session";
	text-align: center;
	font-size: 50pt;
	background-color: white;
	padding: 5%;
	width: 100%;
	position: absolute;
	top: 50%;
	transform: translateY(-50%);
}

Add time out information to css styling
Add time out information to css styling

see forum oa https://support.openanalytics.eu/t/improving-time-out-screen/224/2