Fix checking for existing cluster names
Make sure unrotated zones always work!
Add option to show zones only to me

Admins might choose to only display zones to themselves instead of all
players.
Don't show names in chat when editing
Don't allow zones named like clusters

And the other way around.
Added MapZone_SetZoneDefaultColor native

Change color of laser beams per group.
Fix deleting all zones when deleting cluster