Feature request: ability to merge node to polygons (replace geometry)

[govvin]

I wish a future version of Vespucci will support this feature, just like JOSM's replace geometry action.

when there's a conflict in the tags, user is given the option which tag to retain, merge both, or merge nothing to the polygon feature.

Reference: https://wiki.openstreetmap.org/wiki/JOSM/Plugins/utilsplugin2#Replace_geometry_.28Ctrl.2BShift.2BG.29