Copy some tags

[jesusfer]

I find myself outlining many buildings lately and adding their addresses. Many times I would like to copy just some generic tags like street, postal code or similar between buildings and right now I have to copy all of them, replace and then remove the most specific ones like housenumber.

Being able to just choose which tags to copy would simplify this workflow. Another option would be to be able to create some king of template to start off with some tags already filled in.

[bryceco]

Duplicate of #807