Upgrader not disabled after upgrading

[John]

It appears that you can still go to ~/admin/upgrade after upgrading to the latest version, and this page is not disabled after running the upgrader. This could be a security issue as it shows the full path to the Blesta installation, and someone could run the upgrade again, using up database resources.

[Paul]

It doesn't actually try to run the migrations (database queries) again. The path should be removed though, CORE-2520. Will look into displaying a message that it has already been upgraded or similar.