Make Powers tab display a game setting rather per-actor
As the SWADE system has evolved, the real divide is less and less between "actors with Powers" and "actors without Powers" and more "settings with Powers" and "settings without Powers".
Proposed: Rather than needing to validate on a per-actor basis, with an AB or other ability "enabling" powers, the display of the Powers tab for actors should be a world setting. Given the importance of this feature, it should probably be On by default and featured in the main "System Settings" section rather than the additional menu.