[minor] rename icons as per FontAwesome 4 (#7136)

diff --git a/erpnext/accounts/page/pos/pos.js b/erpnext/accounts/page/pos/pos.js
index 9aafdae..70db094 100644
--- a/erpnext/accounts/page/pos/pos.js
+++ b/erpnext/accounts/page/pos/pos.js
@@ -733,7 +733,7 @@
 				me.update_paid_amount_status(true);
 				me.create_invoice();
 				me.make_payment();
-			}, "octicon octicon-credit-card");
+			}, "octicon octfa fa-credit-card");
 		}else if(this.frm.doc.docstatus == 1) {
 			this.page.set_primary_action(__("Print"), function() {
 				html = frappe.render(me.print_template, me.frm.doc)
@@ -746,7 +746,7 @@
 		this.page.set_secondary_action(__("New"), function() {
 			me.save_previous_entry();
 			me.create_new();
-		}, "octicon octicon-plus").addClass("btn-primary");
+		}, "octicon octfa fa-plus").addClass("btn-primary");
 	},
 
 	print_dialog: function(){
diff --git a/erpnext/accounts/page/pos/pos.json b/erpnext/accounts/page/pos/pos.json
index 31c043c..abd918a 100644
--- a/erpnext/accounts/page/pos/pos.json
+++ b/erpnext/accounts/page/pos/pos.json
@@ -3,7 +3,7 @@
  "creation": "2014-08-08 02:45:55.931022", 
  "docstatus": 0, 
  "doctype": "Page", 
- "icon": "icon-th", 
+ "icon": "fa fa-th", 
  "modified": "2014-08-08 05:59:33.045012", 
  "modified_by": "Administrator", 
  "module": "Accounts",