Update Nuxeo Control Panel styles

Clone nuxeo-runtime & check this directory:
https://github.com/nuxeo/nuxeo-runtime/tree/master/nuxeo-launcher-commons

See with Julien C to see how to proceed.
UI changed a bit.
You can also add more space between the frame borders and logs.

See both attached files, you can add them in your server ./bin directory and use it to see what i'm talking about