check for Touch event before closing menu #1305
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Under catalyst, as you move the mouse around, it hit tests with UIHoverEvent
these currently trigger closing the menu before you're able to move the mouse up to actually click on anything
we could test explicitly for .hover events and ignore them, but they're not available in earlier versions of iOS, so it's easier to just check for .touches events. This also means that shake, remote control events, etc won't close the menu (though I don't know if they trigger a hit test anyway)