foosel/Octoprint #841: Can't login using IE

Add computed property "name" to function objects if not provided by the
browser, to avoid dropping out of main.js before it is finished.
(cherry picked from commit 68215c6)

src/octoprint/static/js/app/main.js

@@ -57,6 +57,16 @@ $(function() {
         // the view model map is our basic look up table for dependencies that may be injected into other view models
         var viewModelMap = {};
 
+        // Fix Function#name on browsers that do not support it (IE):
+        // see: http://stackoverflow.com/questions/6903762/function-name-not-supported-in-ie 
+        if (!(function f() {}).name) {
+            Object.defineProperty(Function.prototype, 'name', {
+                get: function() {
+                    return this.toString().match(/^\s*function\s*(\S*)\s*\(/)[1];
+                }
+            });
+        }
+
         // helper to create a view model instance with injected constructor parameters from the view model map
         var _createViewModelInstance = function(viewModel, viewModelMap){
             var viewModelClass = viewModel[0];