Dockingport gap linking fixes. Closes #551

- Dockingports force the hatch/door gaps to be connected to the hulls between the ports, because connecting them automatically may fail if the ports are positioned in a non-standard way.
- Gaps don't recheck hulls in OnMapLoaded if rechecks have been disabled.
- Item.UpdateHulls and Gap.UpdateHulls are not called when OnMapLoaded is called during ruin generation.

Barotrauma/BarotraumaClient/Source/Items/DockingPort.cs

@@ -62,6 +62,8 @@ namespace Barotrauma.Items.Components
                 }
             }
 
+            if (!GameMain.DebugDraw) return;
+
             if (bodies != null)
             {
                 for (int i = 0; i < bodies.Length; i++)