Re-arranges Areas - Stage 2

Maintenance Cleanup. This is.. a big one. Sorry.

Ensures each separate maintenance section now has a unique name and relevantly named icon. 
The former will make the lives easier for everyone IG. For example, no longer are there 4 (four!) different sections all called "Medbay maintenance"

The latter will simply make it easier for mappers to see what's what. No more A/P or A/S Maint. icons literately everywhere.