参考：
1.https://community.dynamics.com/ax/f/microsoft-dynamics-ax-forum/105963/adding-fields-to-inventonhand-form-in-ax2012
2.https://community.dynamics.com/ax/b/technicaltutorialsformsdynamicsax2012/posts/how-to-add-field-in-onhand-inventory-form-in-ax-2012