and updated custom format example.

property comes free off TextBox. Updated prefix example to use currency.

and revised "Description."

…f StepSize + MinValue/MaxValue.

…ed old "notes" to Appendix.

and changed UpDownButtons property from Boolean to enum.

and updated examples with these property updates.

…ection template.

… input methods.

…ents.

and updated corresponding behaviors in API Notes.

…er" to list of keys that trigger evaluation.

…der properties + instances.

Left aligned properties.

…umericUpDown

and updated open questions.

this is now covered by NumberBoxNumberRounder and associated properties.

…r evaluation and return NaN if Value is in error state.

Todo: Draw distinctions between V1 and V2 validation features.
Todo: Add new API examples.

* Spec suggestions and feedback

* BasicValidationMode -> ValidationMode

* Removed Spinner button icon/styling properties.

* Added "Is" prefix to hyper and wrap properties.

* Added HeaderTemplate.

* Added clarity on Stepping with Minimum and Maximum

values and fixed DependancyProperties.

* Removed unneeded names from samples.

* Removed todo on Calculations + Spinner - handled in PR comments.

* Typo fix

Co-Authored-By: Yulia Klein <yulikl@microsoft.com>

* Cleaning up template comment bloat.

* Added description to 'AcceptsCalculation' section.

* Updated SpinnerButton placement name and sample description.

* Adding section headers for formatting and validation.

* Migrated V2 features to dedicated section.

* Removed ValueChanging and related event args.

* Updated SpinButton example, APIs, and details.

* Removed hyper APIs from IDL until V2 implementation.

* Added sample for input validation.

* Formalized documentation remark on input scope.

* Fixed formatting on some API names.

* Quick clean up of to-dos.

* Migrated all non-implementation detail items of

Appendix: Behavior Components to Example descriptions or Remarks.

* [DEV] Removed implementation requirement that 

requesting Value should force evaluation. On top of not having a ValueChanging event, reading from Value should not be needed. ValueChanged is an appropriate notification to read from an x:Bind connected data source.

* Added called out absent core TextBox properties.

* Delete numberbox-acceptscalculation.png

* Delete numberbox-suffix.png

* Delete numberbox-prefix.png

* Delete numberbox-placeholder-text.png

* Delete numberbox-ipv4-formatting-example.png

* Delete numberbox-spinnerbutton.png

* Updating images to use real art.

* Delete numberbox-basic.png

* Adding real art for SpinButton placement modes.

* Updated images.

* Update NumberBox.md

* NumberBoxValueChangedEventArgs

* Added labeling example.

* Added Recommendation regarding Value vs Text

* [PM] Added hyperscroll back in.

* Added formatting section.

* Delete numberbox-basic.PNG

* Added labeling images.

* Delete numberbox-basic.PNG

* New basic image.

* Delete numberbox-basic.PNG

* [PM] New basic NumberBox image.

* [PM] Removing old basic image.

* [PM] I think I've fixed this image...

* Updated accessible image descriptions.

* Added formatted NumberBox image.

* Delete numberbox-formatted.png

* Added formatted NumberBox image.