Allow bond orders other than single bond order have stereo option too

[tomyan112]

Is your feature request related to a problem? Please describe. Currently, only full bond order has stereo option. In case of μ-amido-μ-hydroxobis(tetramminecobalt)(4+), if we want to draw NH₃, then we need to choose half bond order and not having stereo option.

μ-amido-μ-hydroxobis(tetramminecobalt)(4+),