Confirmation Emails: Add way to resend (#287)

* Add way to resend confirmation email.

* Resend confirmation email if user sets it to the same as pending

* I10n: No pending email change

app/models/user.rb

@@ -45,7 +45,6 @@ class User < ApplicationRecord
 
   def initiate_email_change(new_email)
     return false if new_email == email
-    return false if new_email == unconfirmed_email
 
     if Rails.application.config.app_mode.self_hosted? && !Setting.require_email_confirmation
       update(email: new_email)
@@ -59,6 +58,15 @@ class User < ApplicationRecord
     end
   end
 
+  def resend_confirmation_email
+    if pending_email_change?
+      EmailConfirmationMailer.with(user: self).confirmation_email.deliver_later
+      true
+    else
+      false
+    end
+  end
+
   def request_impersonation_for(user_id)
     impersonated = User.find(user_id)
     impersonator_support_sessions.create!(impersonated: impersonated)