It is currently unspecified who selection widgets should behave if the nodes, they select, are removed from the datastrorage the selection widget is assigned to.

Following options:

1. The widget keeps hold on the node. (The current implementations of the selection widgets are currently working like that, because it was never specified/ thought off).
2. The widget removes deleted nodes form there selection.

Remark this lacking specification was noticed in context of T26219.