Datepicker does not work with pickadate @ 3.5.6

[ghost]

When using latest pickadate.js (@3.5.6) there is an issue with the z-index:

Plunkr 3.5.3 (works)
Plunkr 3.5.6 (z-index issue)
Just click on the first datepicker.

This is caused by the --focus class not being applied, so it seems a bug in pickadate.js.
As you are including a custom pickadate.js version, I haven't raised this (yet) with pickadate.js.

[mikewheaton]

Thanks for reporting this. You're right that it's caused by the .ms-DatePicker-picker--focused class not being applied in the latest version of Pickadate. For this bug we can actually just update our styles to target only the .ms-DatePicker-picker--opened class. I'll submit a pull request for this.