.notifications-toggles inputs are missing labels

AFFECTS:

• All pages
• xwiki:XWiki.WatchListRss
• xwiki:Main.WebHome
• etc.

ERROR:

• org.xwiki.test.webstandards.CustomDutchWebGuidelinesValidationTest.Validating HTML5 Dutch Web Guidelines validity for: xwiki:XWiki.WatchListRss executed with credentials Admin:admin (from org.xwiki.test.webstandards.AllTests)
• ERROR: An input field has been found with no label association.

INVALIDATES:

• Dutch Guidelines: validateRpd13s1()
  • https://github.com/xwiki/xwiki-platform/blob/master/xwiki-platform-tools/xwiki-platform-tool-standards-validator/src/main/java/org/xwiki/validator/DutchWebGuidelinesValidator.java#L1190
• R-pd.13.1 "Use the label element to explicitly associate text with an input field in a form."

EXPLANATION:

• Missing labels for #notificationPageOnly, #notificationPageAndChildren and #notificationWiki input@type='checkbox'

FIXES:

• Add hidden labels for the inputs
  • Add a label element that surrounds the control's label. Set the for attribute on the label element to the same value as the id attribute of the control. And/or add a title attribute to the input element. And/or create a label element that contains the input element.