Added indeterminate state support

[ogeid-dev]

I added indeterminate state support, may be a little ugly right now because I had to rush it but it may help someone.

[ecttor]

Hello can you help me with this? I have doubts on how to call the indeterminate state. how should I do this?

[ogeid-dev]

Use the data indeterminate data attribute to enable it like so:
<input class="form-control" id="toggle" name="toggle" data-toggle="toggle" data-on="Yes" data-off="No" data-indeterminate="true" type="checkbox">

Then you can set the state like:
$('#toggle').prop('indeterminate', true).change();

And check the state with: $("#toggle").prop("indeterminate")

[ecttor]

Ty, your answer helped me a lot.