add currency filter

src/locales/en.js

@@ -229,6 +229,7 @@ export default {
     'Cancel': 'Cancel',
     'Close': 'Close',
     'Update': 'Update',
+    'None': 'None',
     'Done': 'Done',
     'Continue': 'Continue',
     'Status': 'Status',
@@ -287,6 +288,9 @@ export default {
     'Transfer': 'Transfer',
     'User Profile': 'User Profile',
     'Language': 'Language',
+    'Currency Display Mode': 'Currency Display Mode',
+    'Currency Code': 'Currency Code',
+    'Currency Name': 'Currency Name',
     'Enable Animate': 'Enable Animate',
     'Enable Auto Dark Mode': 'Enable Auto Dark Mode',
     'You have been successfully registered': 'You have been successfully registered',