Tool for selecting areas

[ivan]

Let's suppose JOSM has loaded a bunch of data in where there are lots of adjacent areas, modeled as multipolygon relations, with the boundaries between areas being ways. Right now it's difficult to select an area (e.g. for changing its tags): you have to select one way, and guess which relation is the area you really want.

Thus, a "select area" tool would be greatly appreciated. It could be a tool or a modifier key to the current select/move tool.

Its behaviour should be simple: click on any point in the viewport, and any areas (either closed ways or multipolygons) that overlap the clicked point should be added to the selection list.

It should be desireable for the tool to select closed ways or multipolygons only if they are painted by the current mappaint style.