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Jono Mingard authored
Changed the dropdown navigation to be navigable using the keyboard (if Javascript is enabled). - The tab key navigates all menus and submenus in order - Links in the main navigation bar can be navigated with the left and right arrows - Submenus can be navigated with the up and down arrows and can be closed with the Esc key. Pressing left or right opens the previous or next menu Note: Dropdown navigation works as before with JS disabled and only requires it for keyboard accessibility. Change-Id: Ia7aeb33526c71a2fe3ea4c635f4a8aa17c64e21b Signed-off-by: Jono Mingard <jonom@catalyst.net.nz>
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