Update Property.js to fix a bug related to default value.

static/plugin_dbui/src/form/field/Property.js

@@ -129,8 +129,14 @@ Ext.define("Dbui.form.field.Property", {
 
         "use strict";
 
+        // NOTE
+        // The property initalValue is defined by the mixin
+        // Ext.form.field.Field in the method initValue.
+        // This property is not public but useful to get the default value
+        // in sequence like new, actualiser row2, new, ....
+        //
         var me = this,
-            source = value || me.originalValue;
+            source = value || me.initialValue || {};
 
         me.grid.setSource(source);