Fixes collation mismatch errors for logs deletion

v1.12.4

v1.12.4 fixes collation mismatch error during date comparison for log…

Minor fixes for v1.11

• Corrects call to non-global function load_settings() during upgrade
• Fixes no index issue when checking track_links setting in wp_mail

v1.11.2

• Minor fixes for link tracking setting
• Updates assets to match current SVN repo assets

Link tracking support

Link tracking support is now available and can be enabled in the Settings page.

A few updates to allow wp-mail.php overrides.

1.9

Improve dashboard examples.