Fix #4571: Show banner when email verification is required.

* Show a banner if the user is restricted because they signed up from a
  proxy or VPN.

* Add an option to resend the confirmation email if your account has an
  unverified email address.

app/javascript/src/javascripts/common.js

@@ -15,6 +15,12 @@ $(function() {
     e.preventDefault();
   });
 
+  $("#hide-verify-account-notice").on("click.danbooru", function(e) {
+    $("#verify-account-notice").hide();
+    Cookie.put('hide_verify_account_notice', '1', 3);
+    e.preventDefault();
+  });
+
   $("#close-notice-link").on("click.danbooru", function(e) {
     $('#notice').fadeOut("fast");
     e.preventDefault();