Inconsistency when disabled dates are manually entered in the picker

[kdikov82]

Refer to the following dojo example:
http://dojo.telerik.com/ecILA/2

Steps to reproduce:

1. In empty picker, enter disabled data (6/12/2016) for example
   result -> value is cleared
2. Pick or enter valid date and then change it to a disabled date (without clearing the valid date)
   result -> value is not cleared

[KirilNN]

I would like to see a comment from @ggkrustev, as I am not sure what is the expected behavior here.

[ggkrustev]

We'd need to persist the typed text in 1) to be consistent with 2).

[TL;DR]
Although it sounds strange, the idea behind the widget is to keep the wrong value and allow the developer to validate it with separate validation mechanism.

[kdikov82]

@ggkrustev I agree that 1) should behave as 2), since entering any text (not valid date) will be kept in the input, although that the value will be null in all cases