Rework Cloned Vis links, and a few minor fixes

This branch fixes a couple minor issues:
1.  Double clicking the "Tutorials" button on the nav-bar no longer makes the button black.
2.  Changed Analysis types on Bar Charts.
3.  Cloned Visualizations will no longer give links to the project they were cloned from if the original project is deleted (used to give 404 errors
4.  Wrote a helper that determines if a project is currently being deleted (since it can be hard to distinguish the difference between a project that was deleted and one that is hidden).