paper-speed-dial incorrectly renders open after removing class 'hide'

If the class 'hide' is applied to the paper-speed-dial on **initial render** and then subsequently the 'hide' class is removed, the paper-speed-dial will be shown as opened. Initializing passed down open property from parent component to false does not help.

From user perspective, to close, user must click the FAB twice. Per the Ember inspector the first click sets the paper-speed-dial open property to true (speed-dial remains open), and the second click sets the open property to false (speed-dial closes).

Reproduce the initial-render case described for paper-speed-dial: apply the hide class, remove it, and observe the component's open state and required clicks. Trace the paper-speed-dial component and its open-state handling; done means removing hide leaves it closed and one click closes it when appropriate.

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