Prevent deselecting all pairs. Don't colour label backgrounds.
Prevent deselecting all pairs.
Don't colour label backgrounds.

0x6e6562/diffa,lshift/diffa,0x6e6562/diffa,0x6e6562/diffa,lshift/diffa,0x6e6562/diffa,lshift/diffa,lshift/diffa,lshift/diffa