title: delete telegram channel users fails
body: <p>I am trying to delete a user from a telegram private channel. I click on the user, then on the <em>delete</em> link, but I get no response and of course the user is not deleted. I have checked <a href="https://telegram.org/faq_channels" rel="nofollow noreferrer">the FAQ</a> which instructs to do what I have done, which seems to be seamless.</p>
  
  <p>I am also trying to change the administrator and set admins but it does not work. As with my primary concern <a href="https://telegram.org/faq_channels" rel="nofollow noreferrer">the FAQ</a> says I should click on a user and set or unset admin privileges but there is no such menu.</p>
  
  <p>Perhaps this is a temporarily failure? I have tried with opera, chrome and firefox with windows 10.</p>