Refactor neighboring rooms sync-ups. Remove all of the neighboring room objects and recreate them, which fixes a bunch of problems with objects becoming out-of-frame after resize.

GpApp/Grease.cpp

@@ -322,3 +322,15 @@ void FixupFallenGrease(SInt16 where, SInt16 who, SInt16 h, SInt16 v, Boolean *is
 
 	*isDynamic = false;
 }
+
+void RemapGreaseSavedMap(SInt16 removedItem, SInt16 substituteItem)
+{
+	for (int i = 0; i < numGrease; i++)
+	{
+		if (grease[i].mapNum == substituteItem)
+		{
+			grease[i].mapNum = removedItem;
+			return;
+		}
+	}
+}