Using the "external" view is limited by the server difficulty setting. Instead the spectator external camera has been replaced with an oribtal camera as was originally planned to be added alongside the default views.
- Optimize and improve 3D icon drawing
- Combine 2D and 3D PFHs into 1
- Render group icons outside of 200m, unit icons within
- Store list of groups on units update to cut down on what needs to be done each frame
- Change map control type to 100 to remove all default unit icons
- Improve colour caching, group colours don't change, unit colours do
- Remove icon setting, toggling should be at users discretion
