several throw translations (#3441)

* several throw translations

* small fix

* codacy fixes

* fix import _

* Create file_list.js

* Create feedback.py

payments/payment_gateways/doctype/paypal_settings/paypal_settings.py

@@ -156,7 +156,7 @@ class PayPalSettings(Document):
 
 		response = make_post_request(url, data=params.encode("utf-8"))
 		if response.get("ACK")[0] != "Success":
-			frappe.throw("Looks like something is wrong with this site's Paypal configuration.")
+			frappe.throw(_("Looks like something is wrong with this site's Paypal configuration."))
 
 		return response