Converted the 3 editable tabs images in one sprite, to avoid FOUC on hover.
Converted the 3 editable tabs images in one sprite, to avoid FOUC
on hover.

samwa/loconomics,loconomics/loconomics,loconomics/loconomics,loconomics/loconomics,samwa/loconomics,samwa/loconomics,loconomics/loconomics,samwa/loconomics