Action to make selected node(s) a cut node?

[grischard]

The current way to add a cut node is to click on it while in ContourMerge mode.

Often, when merging admin boundaries, this will be very systematic. Selecting a relation's member ways, then the way nodes, then doing a find on ways:2- finds all the nodes I'd like to have as cut nodes. Unfortunately, as far as I can tell, there's no way to make the selected node cut nodes?