updated language and separated slickgrid files

selling/doctype/lead/locale/_messages_doc.json

@@ -11,7 +11,6 @@
  "Source", 
  "Country", 
  "Interested", 
- "Call", 
  "Exhibition", 
  "Your sales person who will contact the lead in future", 
  "Supplier", 
@@ -35,6 +34,7 @@
  "Lead Owner", 
  "Advertisement", 
  "Consultant", 
+ "Call", 
  "Date on which the lead was last contacted", 
  "Naming Series", 
  "<a href=\"#!Sales Browser/Territory\">To manage Territory, click here</a>",