Nojs chat: add fallback meta refresh to redirect url

Hacky workaround of weird behaviour in Firefox where on a page whose url has a fragment/hash/anchor in it, sometimes a urlless meta refresh tag will jump to the element instead of refreshing the page. Same thing happens if the meta refresh tag's url component is the same as the page's url.
2022-03-03 10:24:09 +00:00 · 2022-03-03 10:24:09 +00:00 · bb3002ffd5
--- a/anonstream/templates/nojs_chat.html
+++ b/anonstream/templates/nojs_chat.html
@ -4,6 +4,7 @@
 <head>
  <meta charset="utf-8">
  <meta http-equiv="refresh" content="4">
+  <meta http-equiv="refresh" content="5; url={{ url_for('nojs_chat_redirect', token=user.token) }}">
  <style>
    html {
      height: 100%;