Remove "Global Footer" top border
Revert "Increase top whitespace of "Google AdSense""

This reverts commit da6e44826715a1fb7b385950588e139915b0812b.
Limit "Google CSE" relative to `$width-content`
Limit "Google AdSense" ad size

This changes display ads in 300x250, 336x280, and 728x90.
Version 6.50.0