Nodes view: long names now fade instead of ...

Added a CSS rule to make long node names in nodes view fade out to white
instead of terminating with an ellipsis (...).

If this works OK, we can use it in other places as well (e.g., proposed
tag list in Project Status).
Made the fade flexible, not fixed width

Change the left value to a %. Works better now.
Merge pull request #91 from martinpolley/master

Changed cutoff for long node names to a fade instead of an ellipsis (...)