[feature] Added Section Breaks to Grids for better visual hierarchy

stock/doctype/delivery_note_item/delivery_note_item.txt

@@ -2,7 +2,7 @@
  {
   "creation": "2013-04-22 13:15:44", 
   "docstatus": 0, 
-  "modified": "2013-07-09 12:42:09", 
+  "modified": "2013-07-10 11:50:59", 
   "modified_by": "Administrator", 
   "owner": "Administrator"
  }, 
@@ -82,6 +82,12 @@
   "reqd": 1, 
   "width": "300px"
  }, 
+ {
+  "doctype": "DocField", 
+  "fieldname": "quantity_and_rate", 
+  "fieldtype": "Section Break", 
+  "label": "Quantity and Rate"
+ }, 
  {
   "default": "0.00", 
   "doctype": "DocField", 
@@ -207,6 +213,12 @@
   "reqd": 0, 
   "width": "100px"
  }, 
+ {
+  "doctype": "DocField", 
+  "fieldname": "warehouse_and_reference", 
+  "fieldtype": "Section Break", 
+  "label": "Warehouse and Reference"
+ }, 
  {
   "doctype": "DocField", 
   "fieldname": "warehouse", 

stock/doctype/material_request_item/material_request_item.txt

@@ -2,7 +2,7 @@
  {
   "creation": "2013-02-22 01:28:02", 
   "docstatus": 0, 
-  "modified": "2013-07-09 11:37:12", 
+  "modified": "2013-07-10 11:53:34", 
   "modified_by": "Administrator", 
   "owner": "Administrator"
  }, 
@@ -64,6 +64,12 @@
   "reqd": 1, 
   "width": "250px"
  }, 
+ {
+  "doctype": "DocField", 
+  "fieldname": "quantity_and_warehouse", 
+  "fieldtype": "Section Break", 
+  "label": "Quantity and Warehouse"
+ }, 
  {
   "doctype": "DocField", 
   "fieldname": "warehouse", 

stock/doctype/purchase_receipt_item/purchase_receipt_item.txt

@@ -2,7 +2,7 @@
  {
   "creation": "2013-05-24 19:29:10", 
   "docstatus": 0, 
-  "modified": "2013-07-09 12:20:50", 
+  "modified": "2013-07-10 11:56:05", 
   "modified_by": "Administrator", 
   "owner": "Administrator"
  }, 
@@ -65,6 +65,12 @@
   "reqd": 1, 
   "width": "300px"
  }, 
+ {
+  "doctype": "DocField", 
+  "fieldname": "received_and_accepted", 
+  "fieldtype": "Section Break", 
+  "label": "Received and Accepted"
+ }, 
  {
   "default": "0.00", 
   "doctype": "DocField", 
@@ -120,6 +126,12 @@
   "reqd": 1, 
   "width": "100px"
  }, 
+ {
+  "doctype": "DocField", 
+  "fieldname": "rate_and_amount", 
+  "fieldtype": "Section Break", 
+  "label": "Rate and Amount"
+ }, 
  {
   "doctype": "DocField", 
   "fieldname": "import_ref_rate", 
@@ -200,6 +212,12 @@
   "reqd": 0, 
   "width": "100px"
  }, 
+ {
+  "doctype": "DocField", 
+  "fieldname": "warehouse_and_reference", 
+  "fieldtype": "Section Break", 
+  "label": "Warehouse and Reference"
+ }, 
  {
   "doctype": "DocField", 
   "fieldname": "warehouse",