Try to reconnect if the page was inactive and the WS closed by the browser

public/scripts/movim_websocket.js

@@ -61,8 +61,7 @@ var MovimWebsocket = {
             var uri = 'ws:' + BASE_URI + 'ws/';
         }
 
-        if (this.connection
-        && this.connection.readyState == 1) {
+        if (typeof this.connection === 'object') {
             this.connection.onclose = null;
             this.connection.close();
         }
@@ -275,3 +274,10 @@ document.addEventListener("DOMContentLoaded", function(event) {
     // And we start it
     MovimWebsocket.init();
 });
+
+// If the Websocket was closed after some innactivity, we try to reconnect
+window.addEventListener('focus', function() {
+    if (MovimWebsocket.connection.readyState > 1) {
+        MovimWebsocket.init();
+    }
+});