Fix #691 : clear root data, flags and condition on reset

Author: mistic100

examples/index.html

@@ -552,6 +552,9 @@ <h3>Output</h3>
       flags: {
         condition_readonly: true
       },
+      data: {
+        root: true
+      },
       rules: [{
         id: 'price',
         operator: 'between',

src/public.js

@@ -46,6 +46,10 @@ QueryBuilder.prototype.reset = function() {
 
     this.model.root.empty();
 
+    this.model.root.data = undefined;
+    this.model.root.flags = $.extend({}, this.settings.default_group_flags);
+    this.model.root.condition = this.settings.default_condition;
+
     this.addRule(this.model.root);
 
     /**