How to show icons with module label/name in erpnext?

Hi Folks,
I want to show icons either font awesome or octicons with the module label/name.
I have edited accounts.py file in erpnext and found no result even after adding icon and running bench start.

Please check below code:
{
“label”: _(“Company and Accounts”),
"icon": “fa fa-sitemap”,
“items”: [
{
“type”: “doctype”,
“name”: “Company”,
“description”: _(“Company (not Customer or Supplier) master.”)
},
{
“type”: “doctype”,
“name”: “Journal Entry”,
“description”: _(“Accounting journal entries.”)
},
{
“type”: “doctype”,
“name”: “Account”,
"icon": “fa fa-sitemap”,
“label”: _(“Chart of Accounts”),
“route”: “Tree/Account”,
“description”: _(“Tree of financial accounts.”),
},
{
“type”: “report”,
“name”:“General Ledger”,
“doctype”: “GL Entry”,
“is_query_report”: True,
},
]
},

Thanks.