- Animate back to top when submitting exam, and when clicking "next" after long question. This prevents confusion when user has to see the next screen.
- Changed %%TOTAL%% to %%MAX-POINTS%% for clarify and consistency. The old tag will keep working.

git-svn-id: https://plugins.svn.wordpress.org/watu/trunk@774718 b8457f37-d9ea-0310-8a92-e5e31aec5664