ctrl+drop node merging doesn't use destination node coords

[Ldp]

When merging nodes, using ctrl + dropping the node on another, it doesn't use the coordinates of the destination.

From some observations, I think it is currently finding the lowest (positive) node id, and using those node coords as the merged node location. It should always use the coordinates of the (destination) node.

This used to work fine some months ago.

I'm using 2300.

[Ldp]

Of course, by lowest node id, I mean the lowest node id of the nodes involved in the merge. Not the lowest node id in the entire loaded dataset.

[Gubaer]

(In [2310]) fixed #3755: ctrl+drop node merging doesn't use destination node coords