Added proximity CSS from @cfarquharson.
Merge pull request #3493 from thomasgohard/css-proximity

Added proximity CSS from @cfarquharson
Toggle: add ability to toggle details elements

1. Added "toggled.wb-toggle" event that triggers once toggle complete.
2. Added toggleDetails method to open/close details elements.
3. Updated working examples with toggle details.
Merge branch 'toggle-details' into v4.0
Menu: load secondary menu in main menu panel

If #wb-sec exists in the DOM, it is prepended to the #wb-sm
panel menu once the menu as finished loading (loaded.wb-menu event).
Menu: virtual click handling of menu items

Allows menus with hidden subment items to be opened on
virtual click (triggers onHoverFocus processing).