Time picker defaults to current DateTime on error, instead of keeping the selected date.

[EduardsBrown]

Bug description:

When you enter an invalid hour such as 0 or empty, the DatePicker entry gets reset and defaults to current DateTime.

Selection:

DateTime Resets:

Default Used:

I believe it should keep the selected DateTime.

Version of Angular, UIBS, and Bootstrap

angular: 1.5.0 bootstrap-ui-datetime-picker: 1.2.0 bootstrap-sass: 3.3.1

I've also tried on latest versions, and got the same result.

Angular: The issue lives inside timepicker.js

var invalidate = function(invalidHours, invalidMinutes, invalidSeconds) {
      ngModelCtrl.$setViewValue(null);
      ngModelCtrl.$setValidity('time', false);
      if (angular.isDefined(invalidHours)) {
        $scope.invalidHours = invalidHours;
      }
      if (angular.isDefined(invalidMinutes)) {
        $scope.invalidMinutes = invalidMinutes;
      }
      if (angular.isDefined(invalidSeconds)) {
        $scope.invalidSeconds = invalidSeconds;
      }
};

Specifically: ngModelCtrl.$setViewValue(null);

Reproduced bug plnkr: https://embed.plnkr.co/SZC1uUaXDcE9CLSb9JiI/

Possible solution plnkr: https://embed.plnkr.co/fj1Ckcg2EcC9ZTaW9Zl1/

(Sometimes when you open the plnkrs, they give Service Unavailable error, please close the plnkr and click on the link again, and it should work).

I am willing to make the change and submit a pull request, if this is fine?

[EduardsBrown]

I've tried to fix this by branching off, but after adding the fix the tests didn't pass. I am looking into other ways to fix this issue.