Revert "getContent for empty inputs return empty string now"

This reverts commit 5ba4e004

gadget_json_generated_form_child.js

@@ -1058,6 +1058,7 @@
         var json_dict = {},
           k;
         g.props.inputs.forEach(function (input) {
+          if (input.name === "" || input.value !== "") {
             if (input.type === 'number') {
               json_dict[input.name] = parseInt(input.value, 10);
             } else if (input.value === "true") {
@@ -1073,6 +1074,7 @@
             } else {
               json_dict[input.name] = input.value;
             }
+          }
         });
         for (k in json_dict) {
           if (json_dict.hasOwnProperty(k)) {