Add resend confirmation for admin (#7378)

* Add confirmations_controller#resend

* Add tests for confirmations_controller#resend

* Add translations

config/locales/en.yml

@@ -70,6 +70,7 @@ en:
         title: Change Email for %{username}
       confirm: Confirm
       confirmed: Confirmed
+      confirming: Confirming
       demote: Demote
       disable: Disable
       disable_two_factor_authentication: Disable 2FA
@@ -78,6 +79,7 @@ en:
       domain: Domain
       edit: Edit
       email: E-mail
+      email_status: E-mail Status
       enable: Enable
       enabled: Enabled
       feed_url: Feed URL
@@ -116,6 +118,10 @@ en:
       push_subscription_expires: PuSH subscription expires
       redownload: Refresh avatar
       remove_avatar: Remove avatar
+      resend_confirmation:
+        already_confirmed: This user is already confirmed
+        send: Resend confirmation email
+        success: Confirmation email successfully sent!
       reset: Reset
       reset_password: Reset password
       resubscribe: Resubscribe