Fix webconfig race condition

Software/WebConfig/js/usbWrapper.js

@@ -4,27 +4,34 @@
 (function(window, document, navigator) {
 "use strict";
 
-var UsbWrapper = new function() {
-    this.hasUSB = navigator && navigator.usb;
-    
-    if(!this.hasUSB)
-        return;
-    
-    // returns a promise
-    this.connect = (vids, pids) => {
-        var filters = [];
-        for(let i = 0; i < vids.length; i++) {
-            filters.push({ vendorId: vids[i], productId: pids[i] });
-        }
-        return navigator.usb.requestDevice({filters: filters})
-        .catch(error => {
-            console.log(error);
-            return null;
-        });
+// otherwise race condition
+var UsbWrapper_init = function() {
+
+    var UsbWrapper = new function() {
+        this.hasUSB = navigator && navigator.usb;
+        
+        if(!this.hasUSB)
+            return;
+        
+        // returns a promise
+        this.connect = (vids, pids) => {
+            var filters = [];
+            for(let i = 0; i < vids.length; i++) {
+                filters.push({ vendorId: vids[i], productId: pids[i] });
+            }
+            return navigator.usb.requestDevice({filters: filters})
+            .catch(error => {
+                console.log(error);
+                return null;
+            });
+        };
+        
+        this.usb = navigator.usb;
     };
-    
-    this.usb = navigator.usb;
-};
+
+    window.UsbWrapper = UsbWrapper;
+}
+
+window.UsbWrapper_init = UsbWrapper_init;
 
-window.UsbWrapper = UsbWrapper;
 })(window, document, navigator);