Use JavaScript library links instead of copies in login screens

Fix https://github.com/origam/origam-source/security/code-scanning errors by including links to the libraries instead of their copies.

Is it a good idea to let third parties decide what code will run on our login page?

As they mention in the thread, google will probably not hack us…

You are right. What version are we using and does it make sense to upgrade? Can it be automated in another way (like nuget)?