Update bom.py

Hi guys,

Just a proposal to sort the Materials Required (Exploded) from the BOM.
So the items and sub-assemblies items looks a little bit more organized in the list.

Cheers
Alexandre

erpnext/manufacturing/doctype/bom/bom.py

@@ -8,6 +8,8 @@ from frappe.utils import cint, cstr, flt
 from frappe import _
 from frappe.model.document import Document
 
+from operator import itemgetter, attrgetter
+
 class BOM(Document):
 
 	def autoname(self):
@@ -360,7 +362,7 @@ class BOM(Document):
 		"Add items to Flat BOM table"
 		frappe.db.sql("""delete from `tabBOM Explosion Item` where parent=%s""", self.name)
 		self.set('flat_bom_details', [])
-		for d in self.cur_exploded_items:
+		for d in sorted(self.cur_exploded_items, key=itemgetter(0)):
 			ch = self.append('flat_bom_details', {})
 			for i in self.cur_exploded_items[d].keys():
 				ch.set(i, self.cur_exploded_items[d][i])