small fixes to tracking script and to ui

resources/views/tracking/tracker.blade.php

@@ -128,7 +128,7 @@
         }
     }
 
-    // ---- Send Beacon ----
+    // ---- Send Data ----
 
     function send(data) {
         var vid = getVisitorId();
@@ -156,15 +156,13 @@
             os_version: os.version.substring(0, 20),
         }, utm, data);
 
-        var blob = new Blob([JSON.stringify(payload)], { type: "application/json" });
-
-        if (navigator.sendBeacon) {
-            navigator.sendBeacon(COLLECT_URL, blob);
-        } else {
+        try {
             var xhr = new XMLHttpRequest();
             xhr.open("POST", COLLECT_URL, true);
             xhr.setRequestHeader("Content-Type", "application/json");
             xhr.send(JSON.stringify(payload));
+        } catch(e) {
+            // Silent fail
         }
     }