TWAdd should validate fields as they are entered

[tecfu]

The current behavior of

TWAdd:

is such that the fields entered by the user are validated after all are input. In the case that one of the inputs fails validation, an error message is displayed and the user is then forced to re-enter the task again.

Instead, the fields should be validated as they are input...preventing a scenario where the user has to repeatedly enter data to add a task.