simplify getContent for arrays

gadget_json_generated_form.js

@@ -156,9 +156,7 @@
         form_gadget.element.setAttribute("data-json-parent", parent_path);
         form_gadget.element.setAttribute("data-gadget-parent-scope",
           g.element.getAttribute("data-gadget-scope"));
-        if (options.parent_type === "array") {
-          g.props.arrays[parent_path] = 1;
-        } else {
+        if (options.parent_type !== "array") {
           g.props.objects[parent_path][property_name] = scope;
           form_gadget.element.setAttribute("data-json-property-name", property_name);
         }
@@ -345,6 +343,7 @@
         first_path + '/'
       );
       div.setAttribute("data-json-path", first_path + '/');
+      gadget.props.arrays[first_path +  '/'] = div;
       div.setAttribute("data-json-type", json_field.type);
     }
 
@@ -649,7 +648,7 @@
 
     for (path in options.arrays) {
       if (options.arrays.hasOwnProperty(path)) {
-        array = g.element.querySelector("div[data-json-path='" + path + "']")
+        array = options.arrays[path]
           .querySelectorAll("div[data-json-parent='" + path + "']" +
             "[data-gadget-parent-scope='" + g.element.getAttribute("data-gadget-scope") + "']");
         len = array.length;