Consider removing branch entirely when deleting chain of branches into combinator

[glopesdev]

Consider the following workflow:

In the current version of the editor, deleting the node in the bottom branch will leave it dangling:

However, in most cases we find that we would prefer to remove the dangling branch entirely:

Removing branches manually is annoying since it requires currently either dragging-dropping, context menus or keyboard navigation. It would be great to have the default be remove the branch fully and then maybe have some modifier key that would leave dangling branches in place as an opt-in action.