Data loss when joining address node into building

[Dakon]

You need a building and an address node. That node should have addr:street, addr:housenumber and at least one other tag of choice (e.g. addr:country). Select the building, select the node, press Shift-T.

Outcome:
-the building has addr:street and addr:housenumber
-the node is gone (with all other tags)!

Either _all_ tags should be copied into the building (maybe asking on collisions), or only addr:* ones (all of them!), in the latter case the node should be preserved and just the copied tags removed from it.

[skyper]

Close to #6178

[Don-vip]

Fixed in [o29509].