Implemented filtering of drop options such that the "move" options is not shown if the dropped item is parent/container of the dropee.
Implemented filtering of drop options such that the "move" options is
not shown if the dropped item is parent/container of the dropee.

Signed-off-by: Jakob Brandsborg Ehmsen <387ed33cc9ebf98b733caa2520baacd616b28aa5@gmail.com>
jakobehmsen/dynamake