- Added support to redraw the charts on the overview page when the browser window is resized.
- Cleaned up css for the overview page so the various widgets resize gracefully and don't overflow their bounds.
- Added "overflow: hidden" to the postbox style to ensure widgets don't overflow their bounds.

git-svn-id: https://plugins.svn.wordpress.org/wp-statistics/trunk@963124 b8457f37-d9ea-0310-8a92-e5e31aec5664