fix: show portal sidebar on login (#18126) (#18127)

(cherry picked from commit 4ca3bf2d0b)

Co-authored-by: Ankush Menat <ankush@frappe.io>

frappe/www/me.py

@@ -13,3 +13,4 @@ def get_context(context):
 		frappe.throw(_("You need to be logged in to access this page"), frappe.PermissionError)
 
 	context.current_user = frappe.get_doc("User", frappe.session.user)
+	context.show_sidebar = True