[Feature Request] Calendar Header Customization

[CnxYankoNikolov]

I was wondering if the DateTimePicker can support a custom component input for the header part of the calendar, kind of like the Angular Material Component does and if none is passed it fallbacks to the current behavior.

https://material.angular.io/components/datepicker/api#MatDatepicker for reference.

I am willing to put in a PR if that is something that the maintainers are willing to accept as I kind of need it for my project.

[CnxYankoNikolov]

This was merged, so I am closing the issue.

[nzbin]

Many thanks for your PR, I will publish tonight.