try not to activate popup when not visible

Author: Dave Conway-Jones

dist/dashboard.appcache

@@ -18,4 +18,4 @@ weather-icons-lite/fonts/weather-icons-lite.woff2
 NETWORK:
 *
 
-# hash: 3cdadf67e539c60570559fb3748c6e7669a2765d114b7145592fe131562325d8
+# hash: aa1028a4cc00955e9c5a35047cf37daa8ca3c5595b70ecc1ff87bee867d7a7e6

dist/js/app.min.js

@@ -31,6 +31,11 @@ if (!String.prototype.startsWith) {
     };
 }
 
+var doVisualUpdates = true;
+document.addEventListener('visibilitychange', function() {
+    doVisualUpdates = !document.hidden;
+});
+
 var app = angular.module('ui',['ngMaterial', 'ngMdIcons', 'ngSanitize', 'ngTouch', 'sprintf', 'chart.js', 'color.picker']);
 
 var locale = (navigator.languages && navigator.languages.length) ? navigator.languages[0] : navigator.language;
@@ -489,7 +494,7 @@ app.controller('MainController', ['$mdSidenav', '$window', 'UiEvents', '$locatio
         });
 
         events.on('disconnect', function(m) {
-            if (!disc) {
+            if (!disc && doVisualUpdates) {
                 $mdToast.show({
                     template: '<md-toast><div class="md-toast-error">&#x2718; &nbsp; Connection lost</div></md-toast>',
                     position: 'top right',