GPII-600: Added aria attributes for text field steppers.
GPII-600: Turned off "autocomplete" announcement for text field steppers since none of those steppers support auto-compolete.
GPII-600: Added WAI-ARIA attributes for custom combo boxes.
GPII-600: Added aira role "application" for combo box wrappers.
GPII-600: Added a common function that gets the aria label id to be shared by various components and widgets, as well as fixing a typo.
Merge branch 'gpii-master' into GPII-600
GPII-600: Added the aria support for on off switches as well as resolving conflicts from merging in master.
Merge remote-tracking branch 'chris/GPII-590' into GPII-600

Conflicts:
	demos/prefsEditor/index.html
	demos/prefsEditor/pcp.html
GPII-600: Added aria attributes for "punctuation marks" radio groups.
GPII-600: Added aria attributes for "magnifier positions" radio group.
Merge branch 'gpii-master' into GPII-600

Conflicts:
	demos/pcp/index.html
GPII-600: Removed "demos/pcp" directory to follow what has been done in the GPII master branch.
GPII-600: Added aria attributes of live regions for dynamically generated divs.
GPII-600: Fixed some header stylings.
GPII-600: Added aria attributes for some PMT checkboxes.
GPII-600: Added aria label for the cursor size slider.
GPII-600: Fixed the error message when the combo drop down box was left with no item selected.
Merge remote-tracking branch 'chris/GPII-590' into GPII-600

Conflicts:
	src/pmt/visualAlternativesCollectivePanel.js
	src/shared/adjusters/html/announceCapitalsTemplate.html
	src/shared/adjusters/html/followingElementTemplate.html
	src/shared/adjusters/html/increaseSizeTemplatePMT.html
	src/shared/adjusters/html/keyEchoTemplate.html
	src/shared/adjusters/html/speakTutorialMessagesTemplate.html
	src/shared/adjusters/html/wordEchoTemplate.html
	src/shared/adjusters/js/Panels.js
	src/shared/adjusters/js/magnifierEnabled.js
	src/shared/adjusters/js/magnifierPosition.js
GPII-600: Fixed issues resulted from merging in GPII-590 branch, that aria attributes set for checkboxes were messed up. Also added proper aria attributes for "show crosshairs" checkbox.
GPII-600: Added aria attributes for checkbox groups.