auto subscribe to background_job when use bgapi

htdocs/portal/assets/js/fsportal.js

@@ -716,11 +716,13 @@ App.usersController = Ember.ArrayController.create({
 
 App.initialize();
 var global_debug_event = false;
+var global_background_job = false;
 
 function eventCallback(data) {
 	console.log(data["Event-Name"]);
 
-	if (global_debug_event) {
+	if (global_debug_event ||
+		(global_background_job && data["Event-Name"] == "BACKGROUND_JOB")) {
 		console.log(data);
 	}
 
@@ -800,6 +802,10 @@ function api(cmdstr)
 //execute bgapi
 function bgapi(cmd)
 {
+	if (!global_background_job) {
+		socket.send("event json BACKGROUND_JOB");
+		global_background_job = true;
+	}
 	api("bgapi " + cmd);
 }