采购订单，“交货日期”改为“需求日期”

frontend/saas-web/app/view/purchase/purchase/FormPanel.js

@@ -46,7 +46,7 @@ Ext.define('saas.view.purchase.purchase.FormPanel', {
             },{
                 xtype : "datefield", 
                 name : "pu_delivery", 
-                fieldLabel : "交货日期",
+                fieldLabel : "需求日期",
                 allowBlank:false,
                 defaultValue: new Date(),
                 columnWidth : 0.25,