themes/openwrt: add an AJAX activity indicator toggle to turn refreshes on and off

themes/openwrt/htdocs/luci-static/openwrt.org/cascade.css

@@ -166,6 +166,20 @@ div.hostinfo {
 	padding: 0.5em;
 }
 
+#xhr_poll_status {
+	cursor: pointer;
+}
+
+#xhr_poll_status #xhr_poll_status_off {
+	font-weight: bold;
+	color: #FF0000;
+}
+
+#xhr_poll_status #xhr_poll_status_on {
+	font-weight: bold;
+	color: #00FF00;
+}
+
 #menubar {
 	position: relative;
 	width: 100%;

themes/openwrt/luasrc/view/themes/openwrt.org/header.htm

@@ -131,6 +131,11 @@ require("luci.http").prepare_content("application/xhtml+xml")
 <div class="hostinfo">
 	<%=hostname%> | <%=luci.version.distversion%> |
 	<%:Load%>: <%="%.2f" % load1%> <%="%.2f" % load5%> <%="%.2f" % load15%>
+	<span id="xhr_poll_status" style="display:none" onclick="XHR.running() ? XHR.halt() : XHR.run()">
+		| <%:Auto Refresh%>:
+		<span id="xhr_poll_status_on"><%:on%></span>
+		<span id="xhr_poll_status_off" style="display:none"><%:off%></span>
+	</span>
 </div>
 
 <ul id="modemenu"><%