Send test email feature added to email settings.

pub/bin/locales/en.php

@@ -218,6 +218,10 @@ return [
     'mfa_disabled' => 'Two factor authentication is disabled.',
     'send_password_reset' => 'Send password reset email',
     'email_send' => 'Email sent',
+    'send_test_mail' => 'Send test email',
+    'send_test_mail_explanation' => 'This test will send an email to the given email address.',
+    'send_mail' => 'Sent',
+    'mail_to' => 'Mail to',
     'api_token_created' => 'API token created',
     'permission_created' => 'Permission created',
     'permission_updated' => 'Permission updated',
@@ -242,6 +246,7 @@ return [
     'inserve_url' => 'Inserve URL',
     'inserve_source' => 'Inserve Configuration',
     'test_connection' => 'Test Connection',
+    'test' => 'Test',
     'connection_success_title' => 'Successful',
     'connection_success_text' => 'Connection made successful',
     'connection_error_title' => 'Error',