ValidationTextBox: change Warning state to Incomplete

[bill]

Thanks. This will allow Form to easily compute Form.state from it's children's states, and to use child.watch() to detect changes in the children's states.

The other thing is that the comment (in ValidationTextBox.js, Select.js) suggests that state == "Normal" when the widget is not in an error / incomplete state, probably you just want to update that to say that it's "". (In any case the comment should be consistent w/the behavior.):

// state: [readonly] String
//		Shows current state (ie, validation result) of input (Normal, Warning, or Error)
state: "",

[Douglas Hays]

(In [23241]) Fixes #11970. Add Incomplete state support for partially valid textbox values, and changed affected automated tests.

[bill]

(In [23242]) Fix test to account for new Incomplete state, refs #11970, #10431.

[bill]

(In [23243]) Make Form take advantage of "Incomplete" / "Error" / "" form widget state changes to recompute state of Form itself.

Since each child widget keeps track of it's state there's no need for the _invalidWidgets array in Form anymore; I think performance is OK without it.

Refs #11970, #11251 !strict.

[bill]

(In [23743]) Update comment, refs #11970.