Add combobox date picker example for issue 34 pull (#1017)

* Add Initial Cut of Date Picker Example (pull #839)

For issue #34, add a directory for datepicker examples and a first cut of code.

* Date Picker Example: Add link to development issue

* updated datepicker example and documentation

* fixed broken reference

* made updates to the documentation

* made updates to the documentation

* made updates to the documentation

* made updated code

* updated example

* updated code

* fixed problem with document clicks when date picker is open

* fixed problem with document clicks when date picker is open

* updated month year title

* improved source code documentation

* focus returns to textbox and added Home and End key commands for first and last day of the week

* edited description of example

* updated documentation

* updated documentation

* updated documentation

* fixed some bugs

* fixed some bugs

* removed some debugging code

* validated js and css code

* fixed bug

* added two regression tests

* updated keyboard behavior for opeing the datepicker

* updated date picker example to support keyboard announcements

* updated date picker example to support keyboard announcements

* updated date picker example to support keyboard announcements

* added down arrow key

* fixe bug with onclick

* updated click event on date to put date in textbox and close dialog

* down arrow appears on input focus

* updated click behaviors for input and calendar button

* updated datepicker document click event to handle clicking in textbox

* updated datepicker document click event to handle clicking in textbox

* updated code for down arrow in textbox

* updated example CSS

* updated code for down arrow in textbox

* fixed bug with document click event for dialog

* fixed interation bugs and added accessibilty feature description

* updated documentation, fied bugs and added a menu button date picker

* fixing mouse interaction issues

* fixed mouse bugs with date picker example

* cleaning up some of the code

* added feature to move to the next or previosu month when clicking on a disabled date

* changed header cells from using aria-label to abbr attribute

* fixed bugs with buttons for changing the next/previous year and month buttons

* fixed bug with next/previous buttons when focus is in the textbox

* created intial example of menu button for opening date picker

* added a file to support spin buttons

* initial implementation of a datepicker using spin buttons

* added documenation about values wrapping for day and month

* added documenation about values wrapping for day and month

* button label is updated with current date information

* button label is updated with current date information for combobox too now

* Move spinbutton and combobox examples

Moved the combobox datepicker to the aria 1.1 combobox directory.
Move the spinbutton date picker to new branch issue125-spinbutton-datepicker-example.

* Remove files copied to new issue1046-datepicker-dialog branch

* updating example to be compatible with date gird used in dialog date picker example

* fixed css bug

* added message live region to dialog

* fixed some bugs related to messages

* updated documentation on live regions

* updated regression test file for noew location of example and added a few tests for combobox

* removed aria-controls from buttons in the dialog to change the month/year and updated the file names to be compatible with other combox file names

* test commit

* test commit 2

* updated date picker code to use the Date object like the datepicker dialog example

* improved code by adding helper functions and removing a redundant function

* updated file name to be consistent wih other examples

* restored previous file name for compatibility with ava testing

* improved code readibility by using helper function to test if same month

* removed some unused variables

* removed unused properties and used helper function to compare days

* updated docuemntation and added ids for developing regression tests

* started integration of dialog box regression tests

* button label now updates with the selected date information

* updated link to provide feedback to point to th epull request

* removed aria-expanded from button

* updated method names to be more consistent and descriptive

* updated documentation

* updated documentation

* updated documentation

* updated documentation

* updated properties to move role and arai-expanded to input box, changed aria-owns to aria-controls and removed disabled days form the date grid

* updated some of the tests

* updated tests and fixe a tabindex bug

* removed some unused code

* removed unused functions

* updated CSS for hding disabled dates

* fixed data-date attribute computation

* fixed html validation bugs

* fixed some bugs

* restored

* restored

* restored

* updated test cases

* Change version in title and footer from 1.1 to 1.2

* changes file name

* updated code

* fixed bug with last row being shown

* added updating button label based on selected date

* This test is no longer needed

* changed design to remove buttons from gridcells

* Added role gridcell to support validator bug for not recognizig `td` in contect of a `role=grid` as a `gridcell`

* improved high contrast of combobox buton svg image

* added role=groidcell to pass html validator

* fixed bug with aria-selected

* fixed bug with aria-select following focus

* separated space and enter behavior and fixed bug with focus on combobox when page loads

* Updated links to source files

* Fixed broken link

* updated tests and added keyboard event for button

* updated test using the SPACE key

* updated focus styling

* Apply editorial suggestions from code review by @carmacleod

Co-Authored-By: Carolyn MacLeod <Carolyn_MacLeod@ca.ibm.com>

* updated focus styling to use solid borders

* updated styling of date with tabindex=0

* updated regression tests coverage to inlcude missing tests

* removed reference to undefined object

* Add missing data-test-id for tabindex=-1

* Add test for month-year-button-space-return

* removed code to update button with the current date

* Fix an assertion in the month-year-button-space-return test

* Use await where appropriate

Tests were sometimes passing and sometimes failing in CI.
I think the reason may be that the code wasn't using await consistently.

* fixed regression test to use Key.SPACE instead of space character

* made improvements to high contrast support

* updating regression tests

* updated regression test to use queryElements and remove t.plan, but getting rejected promise errors

* updated documentation on high contrast support

* updated documentation on high contrast support

* updated documentation on high contrast support

* updated documentation on high contrast support

* Fix tests to use queryElements correctly

* Fix spelling errors caught by npm run lint:spelling

* Add stubs for missing tests

* removed code for an unused live region for a combobox message

Co-authored-by: Matt King <a11yThinker@gmail.com>
Co-authored-by: Carolyn MacLeod <Carolyn_MacLeod@ca.ibm.com>
Co-authored-by: Simon Pieters <zcorpan@gmail.com>

cspell.json

@@ -7,6 +7,7 @@
     ],
     "words": [
         "activedescendant",
+        "affordance",
         "ahederson",
         "alertdialog",
         "amet",
@@ -79,6 +80,7 @@
         "Garaventa",
         "Geppy",
         "gridcell",
+        "gridcells",
         "GUIs",
         "Gunderson",
         "haspopup",
@@ -136,6 +138,7 @@
         "Nemeth",
         "Nihonium",
         "nofollow",
+        "norotate",
         "Nurthen",
         "NVDA",
         "Obel",