FIXUP: Don't allow individual undo of address/building merges (#79)

Signed-off-by: Taylor Smock <taylor.smock@kaart.com>

src/main/java/org/openstreetmap/josm/plugins/mapwithai/backend/commands/conflation/MergeAddressBuildings.java

@@ -102,7 +102,7 @@ public class MergeAddressBuildings extends AbstractConflationCommand {
 
     @Override
     public boolean allowUndo() {
-        return true;
+        return false;
     }
 
     @Override

src/main/java/org/openstreetmap/josm/plugins/mapwithai/backend/commands/conflation/MergeBuildingAddress.java

@@ -127,7 +127,7 @@ public class MergeBuildingAddress extends AbstractConflationCommand {
 
     @Override
     public boolean allowUndo() {
-        return true;
+        return false;
     }
 
     @Override