Web config improvements
- Added a session plugin page
- Some navigation improvements to be able to handle middle and big sized configurations.
- Some bug fixes concerning page reload and handling tree events
- Repository clean up and fetch third-party JS from CDN. In the future we might do something more sophisticated like nodejs packaging but for now seems enough
It is probably a lot to take in... I am sorry for such a big pull request. For what is worth, it is working in ID31