Add operation to snap node/vertex to underlying way

Description

Done lots of battle with this, Snapping (to get the small white node to link to another line to turn larger grey as evidence the command was executed. Sometimes it is only working after uploading e.g. two new buildings, with offset (none aligned facades,), where 1 building corner meets the wall of the second building. Only after saving can I grab the corner node,,wiggle it with the mouse, to get it to snap to the adjacent building outline.

Since I often do small correction on a the small touch screen of my phone, it would be nice to be able to select such a white node top of an adjacent area outline, or way. The selection works on touch screen,then holding the node brings up the pop up menu with all the editing bells, but on there no option to make that node snap confirmed by turning grey. Could imagine having the + re-used for this when only a single node is selected.

Sample:

Screenshots

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