labor optimization tweaks/fixes

- fixes at least on cause where loading/re-loading optimization plans
resulted in incorrect ordering and the plan wasn't refreshed properly if
cancelled
use consistent role ratings

- resolves #152 by showing the display role ratings where applicable
(tooltips, detail dock) while still using the raw ratings for
optimization and exporting)
fix fortress name

- the world_site_type and active_sites_vector are actually not global
addresses, and should be moved to a separate section in the memory
layouts for clarity. then the boolean flag passed to m_layout->address
can be removed