[fix] Adding rows not allowed in Variant table in Manage Variants and Item form

erpnext/stock/doctype/item/item.json

@@ -216,7 +216,7 @@
    "options": "Variant Attribute", 
    "permlevel": 0, 
    "precision": "", 
-   "read_only": 0
+   "read_only": 1
   }, 
   {
    "fieldname": "inventory", 
@@ -900,9 +900,9 @@
   }
  ], 
  "icon": "icon-tag", 
- "idx": 1,
+ "idx": 1, 
  "max_attachments": 1, 
- "modified": "2015-07-01 17:20:18.204558", 
+ "modified": "2015-07-09 02:23:47.669199", 
  "modified_by": "Administrator", 
  "module": "Stock", 
  "name": "Item", 

erpnext/stock/doctype/manage_variants/manage_variants.js

@@ -42,6 +42,10 @@ frappe.ui.form.on("Manage Variants", {
 			})
 		});
 	},
+	
+	onload_post_render: function(frm) {
+		frm.get_field("variants").grid.cannot_add_rows = true;
+	},
 
 	item_code:function(frm) {
 		return frappe.call({