Bug - Calendar - misaligned button when validation text appears

[srambach]

Describe the problem
If an invalid date is entered, the reset/toggle calendar button is misaligned. This happens on the Controlled example and the Controlling the date picker calendar state example.

How do you reproduce the problem?
Go to https://www.patternfly.org/v4/components/date-picker#controlled and enter an invalid date

Expected behavior
The primary button on the left should maintain alignment with the input.

Screenshots

[tlabaj]

@srambach this also seems to be broken on the v4 branch https://www.patternfly.org/v4/components/date-picker

[nicolethoen]

I think it may be improved by simply placing the button above the datepicker on a separate line.