Backspacing from beginning of node deletes children #151
Description
go to a node that isn't the first node (let's call it nodeA), and add at least one child.
put the cursor at the beginning of nodeA and hit backspace.
actual behavior:
nodeA will be moved up to be concatenated with the previous node, and all of the children will be deleted
expected behavior:
in tana, backspacing from the beginning of a node does nothing. this seems like the safest bet, because we really want to avoid accidentally deleting children nodes.