fix: Make url variable accessible to all users of it

Line 107 tries to use `url` but can't see it.

Also, clarify usage of window fields.

/puter/src/UI/UIWindowPublishWebsite.js
   67:67  error  'generate_identifier' is not defined  no-undef
  107:54  error  'url' is not defined                  no-undef
  110:17  error  'update_sites_cache' is not defined   no-undef

src/UI/UIWindowPublishWebsite.js

@@ -64,7 +64,7 @@ async function UIWindowPublishWebsite(target_dir_uid, target_dir_name, target_di
  width: 450,
  dominant: true,
  onAppend: function(this_window){
- $(this_window).find(`.publish-website-subdomain`).val(generate_identifier());
+ $(this_window).find(`.publish-website-subdomain`).val(window.generate_identifier());
  $(this_window).find(`.publish-website-subdomain`).get(0).focus({preventScroll:true});
  },
  window_class: 'window-publishWebsite',
@@ -91,8 +91,8 @@ async function UIWindowPublishWebsite(target_dir_uid, target_dir_name, target_di
  puter.hosting.create(
  subdomain, 
  target_dir_path).then((res)=>{
+ let url = 'https://' + subdomain + '.' + window.hosting_domain + '/';
  $(el_window).find('.window-publishWebsite-form').hide(100, function(){
- let url = 'https://' + subdomain + '.' + window.hosting_domain + '/';
  $(el_window).find('.publishWebsite-published-link').attr('href', url);
  $(el_window).find('.publishWebsite-published-link').text(url);
  $(el_window).find('.window-publishWebsite-success').show(100)
@@ -107,7 +107,7 @@ async function UIWindowPublishWebsite(target_dir_uid, target_dir_name, target_di
  $(this).attr('data-website_url', url + $(this).attr('data-path').substring(target_dir_path.length));
  })
 
- update_sites_cache();
+ window.update_sites_cache();
  }).catch((err)=>{
  err = err.error;
  $(el_window).find('.publish-website-error-msg').html(