Indeterminate switch always switches to on after clicked or dragged

[JoJordens]

Even when the indeterminate switch is dragged so the 'off' side shows it slides to the 'on' side and set to 'bootstrap-switch-on' instead of off.
This means it has to be toggled twice in order to set an indeterminate switch to off.

[LostCrew]

read this explanation
we are just making the switch behaving like it is a checkbox in intermediate state. which in fact, it still is.

[LostCrew]

@JoJordens rethinking about it, i figure that setting the right state after label drag from indeterminate state would be beneficial for the user experience, so i corrected the behaviour and it will be included in v3.3.0. thanks!