issue removing values using update()

[sebbarfw]

Let's say you just updated a node:
nodes.update({ id: 1, title: 'my title' })

and than try to remove it (you can't):
nodes.update({ id: 1, title: undefined })
nodes.update({ id: 1, title: null })
nodes.update({ id: 1, title: '' })

A workaround is to use:
nodes.update({ id: 1, title: ' ' }) // space added