GUI Rework: reorganized folders and split app.js

gui/scripts/syncthing/core/directives/uniqueFolderDirective.js

@@ -0,0 +1,21 @@
+angular.module('syncthing.core')
+    .directive('uniqueFolder', function () {
+        return {
+            require: 'ngModel',
+            link: function (scope, elm, attrs, ctrl) {
+                ctrl.$parsers.unshift(function (viewValue) {
+                    if (scope.editingExisting) {
+                        // we shouldn't validate
+                        ctrl.$setValidity('uniqueFolder', true);
+                    } else if (scope.folders[viewValue]) {
+                        // the folder exists already
+                        ctrl.$setValidity('uniqueFolder', false);
+                    } else {
+                        // the folder is unique
+                        ctrl.$setValidity('uniqueFolder', true);
+                    }
+                    return viewValue;
+                });
+            }
+        };
+});