Change the full row highlight checkbox to radiobuttons

This commit changes how the setting to switch between full row
highlight and the old way of only having the icons and names be
activatable in details mode is presented on the settings page.

Before this commit a singular checkbox is used that talks about
the highlight effect.

But the highlight effect isn't actually what users should be
interested in. They mostly care how much of the area can be used to
activate an item. To make this clear this commit uses radio buttons
instead that give a distinctive choice between activation areas.