- Added admin check on plugin settings save.

git-svn-id: https://plugins.svn.wordpress.org/wp-statistics/trunk@945590 b8457f37-d9ea-0310-8a92-e5e31aec5664
- Fixed incorrect default settings for overview display.
- Removed redundant heading.

git-svn-id: https://plugins.svn.wordpress.org/wp-statistics/trunk@945591 b8457f37-d9ea-0310-8a92-e5e31aec5664
- Added checks to ensure when calling array_key_exists() that we're passing an array to avoid PHP warning messages.

git-svn-id: https://plugins.svn.wordpress.org/wp-statistics/trunk@945594 b8457f37-d9ea-0310-8a92-e5e31aec5664