When using the calendar dropdown of the datetimepicker... the user has the ability to click a date part and then click "set" and a the time part is defaulted to a value:

Which results in a full valid datetime if the user doesn't particularly care about the time part:

However, if the user prefers to type in their selection and still doesn't care about the time part... they are left with an invalid value:

They are forced to type in a time part they don't care about which is a waste of time and effort.

Can we get an option to provide a "default autofill value" for the time part so that quick keyboard entry is possible?