[Design View] Handle "delete", regardless of focus
[Design View] Handle "delete", regardless of focus

Now we capture the keyup event on the delete key for the top level
document, in addition to the iframe document.

Now if we've lost focus from the iframe, we can still respond to the
users "delete" request.

Signed-off-by: Shane Bryan <bb9fedbb0bee6c6c53f32da7fce5f936ef59aaaa@intel.com>

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