Merge (selection): No user information about layer state `upload=*`

[skyper]

What steps will reproduce the problem?

1. Have an empty data layer and a file with upload=never in osm header, e.g. example​.
2. Merge layer or merge selection to empty data

What is the expected result?

At least a warning about upload=never

What happens instead?

No user information

Please provide any additional information below. Attach a screenshot if possible.

For value false a warning should be sufficient for never the action could be even denied.
Oh, I see, the information is silently preserved with merge but not with merge selection

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2020-03-07 00:24:28 +0100 (Sat, 07 Mar 2020)
Revision:16051
Build-Date:2020-03-07 02:30:50
URL:https://josm.openstreetmap.de/svn/trunk

[skyper]

Ticket #19810 has been marked as a duplicate of this ticket.

[skyper]

In fact, the state is merged when the layer is merged but if only a selection is merged the state is lost.

[skyper]

Replying to skyper:

In fact, the state is merged when the layer is merged but if only a selection is merged the state is lost.

Think this is ok but we need a warning in both cases.

[skyper]

Just faced this problem again. Please, a waning is needed if layers with different states are merged and if object from one layer are merged to another layer with different states of the two layers.