Make the set category '+' button less bouncy.
Make the set category '+' button less bouncy.

Keep the '+' button in the same place vertically when new items go into
the list.

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