Bug 968447 - The Bookmarks Toolbar Items doesn't appear as a normal menu panel button in new windows. r=Gijs

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extra : rebase_source : 446af8d36736c74cff9e02614f80ac61b757d9ff
Bug 971246 - Fix the display of type='menu' to show the dropmarker in the corner like type='menu-button'. r=mconley

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extra : rebase_source : ca18708f200f7e85b985a2fb7c2a9f091cb0cc8f