…wing shows the baseline markup to create a custom menu popover, where the first menuitem will receive keyboard focus when the popover is invoked due to the use of the autofocus attribute. Navigating the menuitems with arrow keys and activation behaviors would still need author sc…

…abel Label Label-SeparatorLine Link Link-Hyperlink List List-Item List-GridLine MenuItem MenuItem-CheckIcon MenuItem-RadioIcon MenuItem-CascadeIcon ProgressBar ProgressBar-Indicator Sash Sash-Handle Scale Scale-Thumb ScrollBar ScrollBar-Thumb ScrollBar-Thumb-Icon ScrollBar-DownBu…

…on super-property of numerous identifying properties. Issue #1288 : Added types MenuItem MenuSection , and properties hasMenuItem hasMenuSection . A proposed menuAddOn property has also been added. Introduced hasMenu property that supersedes , both for consistency with the other …