[DateTimePicker] Programmatically resetting min and max properties does not work

[georgi-sla]

Describe the bug Having initially set the min and max properties of the DateTimePicker, when trying to change their values programmatically to null or undefined, the component still displays the initial date range.

To Reproduce

1. Create a DateTimePicker component.
2. Bind its min and max properties.
3. Programmatically reset the values of the min and max properties to null or undefined.

For a better illustration of the issue, please reference the following StackBlitz demo: https://stackblitz.com/edit/angular-z5gwd7-nteo1h?file=src%2Fapp%2Fapp.component.ts

Expected behavior When the min and max properties are set to null or undefined, the component should not display a specific range but all dates instead.

[spierala]

I am also facing this issue. This is clearly regression and should be fixed as fast as possible.

It is strange that you can set the min/max to any date dynamically but it is not possible to set it to undefined. I can not imagine that it would be hard to fix. This should be low hanging fruit to make your paying (!) clients happy.

If Kendo would be open-source this issue would have been fixed long time ago.

[tswetti]

Fixed in v15.2.0