Make more things clickable in the bookmark bar menus:
Make more things clickable in the bookmark bar menus:

- folder within a folder
- "empty" menu item

Note that it can be hard to click on a folder within a folder since hovering over the folder pops up a submenu that grabs focus, so you end up needing to right click twice. It's a little odd but the hackery required to fix it doesn't seem worth it.

BUG=15886
TEST=right click on an empty menu item

Review URL: http://codereview.chromium.org/155586

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@20785 0039d316-1c4b-4281-b951-d872f2087c98

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