Remove block dropdown menu separator from keyboard navigation #10364
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Blockly dropdown menus that include a
HorizontalRuleMenuItem
(menu separator) as aMenuItem
have an issue where the menu separator becomes the selected menu item in a non-obvious way when navigating the dropdown via keyboard.See the video below for an example of this. Keyboard navigation should only visit the 4 'real' items in this dropdown, however, it also visits the menu separator as a 5th item.
Screen.Recording.2025-01-30.162244.mp4
This PR disables the separator menu item so that it is ignored by keyboard navigation.