The current adsense implementation only places ads on desktop-sized
screens. This change allows ads of the appropriate size to be
displayed on any device.
fixes#224
This change the single select box into a checkbox which toggles the
mod on/off. If the mod is "on" and it has multiple versions, then
a selection list will be shown with the various possible versions.
If there is only a single available version, then the selector is
not shown.
Andrew Miner