Added the new event S_EVENT_REMOVE_UNIT to trigger the removal of units (from groups also) when a :Destroy(false) or :Destroy() is called for a UNIT object.

The units are then removed from each SET that is subscribed to a set of UNIT objects or GROUP objects! Also the DATABASE is correctly managing this new removal method.
This to prevent the DATABASE getting corrupted with dead units, which were removed with :Destroy(), but which weren't cleaned from the database.

Moose Development/Moose/Core/Base.lua

@@ -656,6 +656,22 @@ function BASE:CreateEventDead( EventTime, Initiator )
   world.onEvent( Event )
 end
 
+--- Creation of a Remove Unit Event.
+-- @param #BASE self
+-- @param DCS#Time EventTime The time stamp of the event.
+-- @param DCS#Object Initiator The initiating object of the event.
+function BASE:CreateEventRemoveUnit( EventTime, Initiator )
+  self:F( { EventTime, Initiator } )
+
+  local Event = {
+    id = EVENTS.RemoveUnit,
+    time = EventTime,
+    initiator = Initiator,
+    }
+
+  world.onEvent( Event )
+end
+
 --- Creation of a Takeoff Event.
 -- @param #BASE self
 -- @param DCS#Time EventTime The time stamp of the event.