fix hang in loading page after force update check

initTracker() exited prematurely when called after force check for update.
This happens only when there is no update available.

Author: rossengeorgiev

js/app.js

@@ -63,11 +63,11 @@ var loadComplete = function(e) {
 
 // loads the tracker interface
 function trackerInit() {
-    if(map) return;
-
     $('#loading,#settingsbox,#aboutbox,#chasebox').hide(); // welcome screen
     $('header,#main').show(); // interface elements
 
+    if(map) return;
+
     if(is_mobile || embed.enabled) $(".nav .embed").hide();
 
     if(!is_mobile) {