There's a separate command /pvphotbar for manipulating your PvP bars, but it only works on PvP actions.

The PvP bars and PvE bars are separate because there is no longer parity between the actions. PvP actions are consolidated into just a few (5~10) context-sensitive action buttons that become different abilities based on the current state of buffs and skill chains. Even though there might be PvP abilities with the same names as PvE abilities, they are distinct abilities and can only be used in their respective environments.